diff --git a/test/__snapshots__/api-spec.ts.snap b/test/__snapshots__/api-spec.ts.snap
index 12a5e20b..3e9f86ce 100644
--- a/test/__snapshots__/api-spec.ts.snap
+++ b/test/__snapshots__/api-spec.ts.snap
@@ -4,13 +4,29 @@ exports[`api > should create archive from directory (with nothing packed) 1`] =
 {
   "files": {
     ".hiddenfile.txt": {
-      "size": "<size>",
+      "integrity": {
+        "algorithm": "SHA256",
+        "blockSize": 4194304,
+        "blocks": [
+          "d400d9a74f67e724a4793173d73e1403bd6b734930632f4eee50a3a5a1e5a478",
+        ],
+        "hash": "d400d9a74f67e724a4793173d73e1403bd6b734930632f4eee50a3a5a1e5a478",
+      },
+      "size": 19,
       "unpacked": true,
     },
     "dir1": {
       "files": {
         "file1.txt": {
-          "size": "<size>",
+          "integrity": {
+            "algorithm": "SHA256",
+            "blockSize": 4194304,
+            "blocks": [
+              "420149d3f852894ba7f32e9d3ec7d8919ee2451724bf2580b0186cd373bd6d82",
+            ],
+            "hash": "420149d3f852894ba7f32e9d3ec7d8919ee2451724bf2580b0186cd373bd6d82",
+          },
+          "size": 9,
           "unpacked": true,
         },
       },
@@ -19,22 +35,54 @@ exports[`api > should create archive from directory (with nothing packed) 1`] =
     "dir2": {
       "files": {
         "file2.png": {
-          "size": "<size>",
+          "integrity": {
+            "algorithm": "SHA256",
+            "blockSize": 4194304,
+            "blocks": [
+              "cc402b796dc92b2b1f3a6d09515003d8400e63d8acaffc967e49c0cf015fcffe",
+            ],
+            "hash": "cc402b796dc92b2b1f3a6d09515003d8400e63d8acaffc967e49c0cf015fcffe",
+          },
+          "size": 182,
           "unpacked": true,
         },
         "file3.txt": {
-          "size": "<size>",
+          "integrity": {
+            "algorithm": "SHA256",
+            "blockSize": 4194304,
+            "blocks": [
+              "a665a45920422f9d417e4867efdc4fb8a04a1f3fff1fa07e998e86f7f7a27ae3",
+            ],
+            "hash": "a665a45920422f9d417e4867efdc4fb8a04a1f3fff1fa07e998e86f7f7a27ae3",
+          },
+          "size": 3,
           "unpacked": true,
         },
       },
       "unpacked": true,
     },
     "emptyfile.txt": {
-      "size": "<size>",
+      "integrity": {
+        "algorithm": "SHA256",
+        "blockSize": 4194304,
+        "blocks": [
+          "e3b0c44298fc1c149afbf4c8996fb92427ae41e4649b934ca495991b7852b855",
+        ],
+        "hash": "e3b0c44298fc1c149afbf4c8996fb92427ae41e4649b934ca495991b7852b855",
+      },
+      "size": 0,
       "unpacked": true,
     },
     "file0.txt": {
-      "size": "<size>",
+      "integrity": {
+        "algorithm": "SHA256",
+        "blockSize": 4194304,
+        "blocks": [
+          "41a978be88ff87a57308bf234106a57ebf9aa0971e2101e75113547a815be72b",
+        ],
+        "hash": "41a978be88ff87a57308bf234106a57ebf9aa0971e2101e75113547a815be72b",
+      },
+      "size": 13,
       "unpacked": true,
     },
   },
@@ -73,30 +121,78 @@ exports[`api > should create archive from directory (with transformed files) 1`]
 {
   "files": {
     ".hiddenfile.txt": {
-      "size": "<size>",
+      "integrity": {
+        "algorithm": "SHA256",
+        "blockSize": 4194304,
+        "blocks": [
+          "d400d9a74f67e724a4793173d73e1403bd6b734930632f4eee50a3a5a1e5a478",
+        ],
+        "hash": "d400d9a74f67e724a4793173d73e1403bd6b734930632f4eee50a3a5a1e5a478",
+      },
+      "size": 19,
     },
     "dir1": {
       "files": {
         "file1.txt": {
-          "size": "<size>",
+          "integrity": {
+            "algorithm": "SHA256",
+            "blockSize": 4194304,
+            "blocks": [
+              "420149d3f852894ba7f32e9d3ec7d8919ee2451724bf2580b0186cd373bd6d82",
+            ],
+            "hash": "420149d3f852894ba7f32e9d3ec7d8919ee2451724bf2580b0186cd373bd6d82",
+          },
+          "size": 9,
         },
       },
     },
     "dir2": {
       "files": {
         "file2.png": {
-          "size": "<size>",
+          "integrity": {
+            "algorithm": "SHA256",
+            "blockSize": 4194304,
+            "blocks": [
+              "cc402b796dc92b2b1f3a6d09515003d8400e63d8acaffc967e49c0cf015fcffe",
+            ],
+            "hash": "cc402b796dc92b2b1f3a6d09515003d8400e63d8acaffc967e49c0cf015fcffe",
+          },
+          "size": 182,
         },
         "file3.txt": {
-          "size": "<size>",
+          "integrity": {
+            "algorithm": "SHA256",
+            "blockSize": 4194304,
+            "blocks": [
+              "a665a45920422f9d417e4867efdc4fb8a04a1f3fff1fa07e998e86f7f7a27ae3",
+            ],
+            "hash": "a665a45920422f9d417e4867efdc4fb8a04a1f3fff1fa07e998e86f7f7a27ae3",
+          },
+          "size": 3,
         },
       },
     },
     "emptyfile.txt": {
-      "size": "<size>",
+      "integrity": {
+        "algorithm": "SHA256",
+        "blockSize": 4194304,
+        "blocks": [
+          "e3b0c44298fc1c149afbf4c8996fb92427ae41e4649b934ca495991b7852b855",
+        ],
+        "hash": "e3b0c44298fc1c149afbf4c8996fb92427ae41e4649b934ca495991b7852b855",
+      },
+      "size": 0,
     },
     "file0.txt": {
-      "size": "<size>",
+      "integrity": {
+        "algorithm": "SHA256",
+        "blockSize": 4194304,
+        "blocks": [
+          "41a978be88ff87a57308bf234106a57ebf9aa0971e2101e75113547a815be72b",
+        ],
+        "hash": "41a978be88ff87a57308bf234106a57ebf9aa0971e2101e75113547a815be72b",
+      },
+      "size": 13,
     },
   },
 }
@@ -108,25 +204,65 @@ exports[`api > should create archive from directory (without hidden files) 1`] =
     "dir1": {
       "files": {
         "file1.txt": {
-          "size": "<size>",
+          "integrity": {
+            "algorithm": "SHA256",
+            "blockSize": 4194304,
+            "blocks": [
+              "420149d3f852894ba7f32e9d3ec7d8919ee2451724bf2580b0186cd373bd6d82",
+            ],
+            "hash": "420149d3f852894ba7f32e9d3ec7d8919ee2451724bf2580b0186cd373bd6d82",
+          },
+          "size": 9,
         },
       },
     },
     "dir2": {
       "files": {
         "file2.png": {
-          "size": "<size>",
+          "integrity": {
+            "algorithm": "SHA256",
+            "blockSize": 4194304,
+            "blocks": [
+              "cc402b796dc92b2b1f3a6d09515003d8400e63d8acaffc967e49c0cf015fcffe",
+            ],
+            "hash": "cc402b796dc92b2b1f3a6d09515003d8400e63d8acaffc967e49c0cf015fcffe",
+          },
+          "size": 182,
         },
         "file3.txt": {
-          "size": "<size>",
+          "integrity": {
+            "algorithm": "SHA256",
+            "blockSize": 4194304,
+            "blocks": [
+              "a665a45920422f9d417e4867efdc4fb8a04a1f3fff1fa07e998e86f7f7a27ae3",
+            ],
+            "hash": "a665a45920422f9d417e4867efdc4fb8a04a1f3fff1fa07e998e86f7f7a27ae3",
+          },
+          "size": 3,
         },
       },
     },
     "emptyfile.txt": {
-      "size": "<size>",
+      "integrity": {
+        "algorithm": "SHA256",
+        "blockSize": 4194304,
+        "blocks": [
+          "e3b0c44298fc1c149afbf4c8996fb92427ae41e4649b934ca495991b7852b855",
+        ],
+        "hash": "e3b0c44298fc1c149afbf4c8996fb92427ae41e4649b934ca495991b7852b855",
+      },
+      "size": 0,
     },
     "file0.txt": {
-      "size": "<size>",
+      "integrity": {
+        "algorithm": "SHA256",
+        "blockSize": 4194304,
+        "blocks": [
+          "41a978be88ff87a57308bf234106a57ebf9aa0971e2101e75113547a815be72b",
+        ],
+        "hash": "41a978be88ff87a57308bf234106a57ebf9aa0971e2101e75113547a815be72b",
+      },
+      "size": 13,
     },
   },
 }
@@ -136,30 +272,78 @@ exports[`api > should create archive from directory 1`] = `
 {
   "files": {
     ".hiddenfile.txt": {
-      "size": "<size>",
+      "integrity": {
+        "algorithm": "SHA256",
+        "blockSize": 4194304,
+        "blocks": [
+          "d400d9a74f67e724a4793173d73e1403bd6b734930632f4eee50a3a5a1e5a478",
+        ],
+        "hash": "d400d9a74f67e724a4793173d73e1403bd6b734930632f4eee50a3a5a1e5a478",
+      },
+      "size": 19,
     },
     "dir1": {
       "files": {
         "file1.txt": {
-          "size": "<size>",
+          "integrity": {
+            "algorithm": "SHA256",
+            "blockSize": 4194304,
+            "blocks": [
+              "420149d3f852894ba7f32e9d3ec7d8919ee2451724bf2580b0186cd373bd6d82",
+            ],
+            "hash": "420149d3f852894ba7f32e9d3ec7d8919ee2451724bf2580b0186cd373bd6d82",
+          },
+          "size": 9,
         },
       },
     },
     "dir2": {
       "files": {
         "file2.png": {
-          "size": "<size>",
+          "integrity": {
+            "algorithm": "SHA256",
+            "blockSize": 4194304,
+            "blocks": [
+              "cc402b796dc92b2b1f3a6d09515003d8400e63d8acaffc967e49c0cf015fcffe",
+            ],
+            "hash": "cc402b796dc92b2b1f3a6d09515003d8400e63d8acaffc967e49c0cf015fcffe",
+          },
+          "size": 182,
         },
         "file3.txt": {
-          "size": "<size>",
+          "integrity": {
+            "algorithm": "SHA256",
+            "blockSize": 4194304,
+            "blocks": [
+              "a665a45920422f9d417e4867efdc4fb8a04a1f3fff1fa07e998e86f7f7a27ae3",
+            ],
+            "hash": "a665a45920422f9d417e4867efdc4fb8a04a1f3fff1fa07e998e86f7f7a27ae3",
+          },
+          "size": 3,
         },
       },
     },
     "emptyfile.txt": {
-      "size": "<size>",
+      "integrity": {
+        "algorithm": "SHA256",
+        "blockSize": 4194304,
+        "blocks": [
+          "e3b0c44298fc1c149afbf4c8996fb92427ae41e4649b934ca495991b7852b855",
+        ],
+        "hash": "e3b0c44298fc1c149afbf4c8996fb92427ae41e4649b934ca495991b7852b855",
+      },
+      "size": 0,
     },
     "file0.txt": {
-      "size": "<size>",
+      "integrity": {
+        "algorithm": "SHA256",
+        "blockSize": 4194304,
+        "blocks": [
+          "41a978be88ff87a57308bf234106a57ebf9aa0971e2101e75113547a815be72b",
+        ],
+        "hash": "41a978be88ff87a57308bf234106a57ebf9aa0971e2101e75113547a815be72b",
+      },
+      "size": 13,
     },
   },
 }
@@ -169,26 +353,74 @@ exports[`api > should create files/directories whose names are properties of Obj
 {
   "files": {
     "__proto__": {
-      "size": "<size>",
+      "integrity": {
+        "algorithm": "SHA256",
+        "blockSize": 4194304,
+        "blocks": [
+          "30e2af384186b57fda019524ade9f9afe48e815480b993d14ec8dc68251b592a",
+        ],
+        "hash": "30e2af384186b57fda019524ade9f9afe48e815480b993d14ec8dc68251b592a",
+      },
+      "size": 9,
     },
     "constructor": {
       "files": {
         "__proto__": {
-          "size": "<size>",
+          "integrity": {
+            "algorithm": "SHA256",
+            "blockSize": 4194304,
+            "blocks": [
+              "50fa8ecaf94e458439700a83eaf7c6f3029081d8febebc9450b6c6aee9b3a880",
+            ],
+            "hash": "50fa8ecaf94e458439700a83eaf7c6f3029081d8febebc9450b6c6aee9b3a880",
+          },
+          "size": 21,
         },
         "constructor": {
-          "size": "<size>",
+          "integrity": {
+            "algorithm": "SHA256",
+            "blockSize": 4194304,
+            "blocks": [
+              "5c81cc87f4e79250bb43f9b3de6053bafc0cbf065c41b6a52798c9b6a03c9129",
+            ],
+            "hash": "5c81cc87f4e79250bb43f9b3de6053bafc0cbf065c41b6a52798c9b6a03c9129",
+          },
+          "size": 23,
         },
         "file1": {
-          "size": "<size>",
+          "integrity": {
+            "algorithm": "SHA256",
+            "blockSize": 4194304,
+            "blocks": [
+              "9dd856cf2f871758dce64bdd6d49cf445b57d01aff11096f3aaa3ea33611a5a1",
+            ],
+            "hash": "9dd856cf2f871758dce64bdd6d49cf445b57d01aff11096f3aaa3ea33611a5a1",
+          },
+          "size": 17,
         },
       },
     },
     "file1": {
-      "size": "<size>",
+      "integrity": {
+        "algorithm": "SHA256",
+        "blockSize": 4194304,
+        "blocks": [
+          "c147efcfc2d7ea666a9e4f5187b115c90903f0fc896a56df9a6ef5d8f3fc9f31",
+        ],
+        "hash": "c147efcfc2d7ea666a9e4f5187b115c90903f0fc896a56df9a6ef5d8f3fc9f31",
+      },
+      "size": 5,
     },
     "file2": {
-      "size": "<size>",
+      "integrity": {
+        "algorithm": "SHA256",
+        "blockSize": 4194304,
+        "blocks": [
+          "3377870dfeaaa7adf79a374d2702a3fdb13e5e5ea0dd8aa95a802ad39044a92f",
+        ],
+        "hash": "3377870dfeaaa7adf79a374d2702a3fdb13e5e5ea0dd8aa95a802ad39044a92f",
+      },
+      "size": 5,
     },
     "folder1": {
       "files": {
@@ -199,25 +431,65 @@ exports[`api > should create files/directories whose names are properties of Obj
                 "__proto__": {
                   "files": {
                     "__proto__": {
-                      "size": "<size>",
+                      "integrity": {
+                        "algorithm": "SHA256",
+                        "blockSize": 4194304,
+                        "blocks": [
+                          "c40006a1a82d348f22d38f5bf10ed462c4e7cb1f50f86a8d218b27e13f25ffeb",
+                        ],
+                        "hash": "c40006a1a82d348f22d38f5bf10ed462c4e7cb1f50f86a8d218b27e13f25ffeb",
+                      },
+                      "size": 51,
                     },
                     "file1": {
-                      "size": "<size>",
+                      "integrity": {
+                        "algorithm": "SHA256",
+                        "blockSize": 4194304,
+                        "blocks": [
+                          "7dfbb507fe3695374af07665ac235e7fe855b915212f5bcb2598a0a52cf16195",
+                        ],
+                        "hash": "7dfbb507fe3695374af07665ac235e7fe855b915212f5bcb2598a0a52cf16195",
+                      },
+                      "size": 47,
                     },
                   },
                 },
                 "constructor": {
-                  "size": "<size>",
+                  "integrity": {
+                    "algorithm": "SHA256",
+                    "blockSize": 4194304,
+                    "blocks": [
+                      "0c003d40febc12fecdbd298e2333f85e4b1d9ae83cc98e774c197b9382380654",
+                    ],
+                    "hash": "0c003d40febc12fecdbd298e2333f85e4b1d9ae83cc98e774c197b9382380654",
+                  },
+                  "size": 43,
                 },
                 "file1": {
-                  "size": "<size>",
+                  "integrity": {
+                    "algorithm": "SHA256",
+                    "blockSize": 4194304,
+                    "blocks": [
+                      "0bb7a8a320274d8cae33ef227d37c185f0a8728ba1859da4bf53f4d228279809",
+                    ],
+                    "hash": "0bb7a8a320274d8cae33ef227d37c185f0a8728ba1859da4bf53f4d228279809",
+                  },
+                  "size": 37,
                 },
               },
             },
           },
         },
         "file1": {
-          "size": "<size>",
+          "integrity": {
+            "algorithm": "SHA256",
+            "blockSize": 4194304,
+            "blocks": [
+              "5ad6fb55a2abd5a1c91f956aa122ef2d0ea4adc7ea4ce148f8007ece667c23ee",
+            ],
+            "hash": "5ad6fb55a2abd5a1c91f956aa122ef2d0ea4adc7ea4ce148f8007ece667c23ee",
+          },
+          "size": 13,
         },
       },
     },
@@ -231,10 +503,26 @@ exports[`api > should handle multibyte characters in paths 1`] = `
     "dir1": {
       "files": {
         "file1.txt": {
-          "size": "<size>",
+          "integrity": {
+            "algorithm": "SHA256",
+            "blockSize": 4194304,
+            "blocks": [
+              "e3b0c44298fc1c149afbf4c8996fb92427ae41e4649b934ca495991b7852b855",
+            ],
+            "hash": "e3b0c44298fc1c149afbf4c8996fb92427ae41e4649b934ca495991b7852b855",
+          },
+          "size": 0,
         },
         "女の子.txt": {
-          "size": "<size>",
+          "integrity": {
+            "algorithm": "SHA256",
+            "blockSize": 4194304,
+            "blocks": [
+              "e3b0c44298fc1c149afbf4c8996fb92427ae41e4649b934ca495991b7852b855",
+            ],
+            "hash": "e3b0c44298fc1c149afbf4c8996fb92427ae41e4649b934ca495991b7852b855",
+          },
+          "size": 0,
         },
       },
     },
diff --git a/test/__snapshots__/cli-spec.ts.snap b/test/__snapshots__/cli-spec.ts.snap
index 16531d43..8b27420e 100644
--- a/test/__snapshots__/cli-spec.ts.snap
+++ b/test/__snapshots__/cli-spec.ts.snap
@@ -4,30 +4,78 @@ exports[`command line interface > should create archive from directory 1`] = `
 {
   "files": {
     ".hiddenfile.txt": {
-      "size": "<size>",
+      "integrity": {
+        "algorithm": "SHA256",
+        "blockSize": 4194304,
+        "blocks": [
+          "d400d9a74f67e724a4793173d73e1403bd6b734930632f4eee50a3a5a1e5a478",
+        ],
+        "hash": "d400d9a74f67e724a4793173d73e1403bd6b734930632f4eee50a3a5a1e5a478",
+      },
+      "size": 19,
     },
     "dir1": {
       "files": {
         "file1.txt": {
-          "size": "<size>",
+          "integrity": {
+            "algorithm": "SHA256",
+            "blockSize": 4194304,
+            "blocks": [
+              "420149d3f852894ba7f32e9d3ec7d8919ee2451724bf2580b0186cd373bd6d82",
+            ],
+            "hash": "420149d3f852894ba7f32e9d3ec7d8919ee2451724bf2580b0186cd373bd6d82",
+          },
+          "size": 9,
         },
       },
     },
     "dir2": {
       "files": {
         "file2.png": {
-          "size": "<size>",
+          "integrity": {
+            "algorithm": "SHA256",
+            "blockSize": 4194304,
+            "blocks": [
+              "cc402b796dc92b2b1f3a6d09515003d8400e63d8acaffc967e49c0cf015fcffe",
+            ],
+            "hash": "cc402b796dc92b2b1f3a6d09515003d8400e63d8acaffc967e49c0cf015fcffe",
+          },
+          "size": 182,
         },
         "file3.txt": {
-          "size": "<size>",
+          "integrity": {
+            "algorithm": "SHA256",
+            "blockSize": 4194304,
+            "blocks": [
+              "a665a45920422f9d417e4867efdc4fb8a04a1f3fff1fa07e998e86f7f7a27ae3",
+            ],
+            "hash": "a665a45920422f9d417e4867efdc4fb8a04a1f3fff1fa07e998e86f7f7a27ae3",
+          },
+          "size": 3,
         },
       },
     },
     "emptyfile.txt": {
-      "size": "<size>",
+      "integrity": {
+        "algorithm": "SHA256",
+        "blockSize": 4194304,
+        "blocks": [
+          "e3b0c44298fc1c149afbf4c8996fb92427ae41e4649b934ca495991b7852b855",
+        ],
+        "hash": "e3b0c44298fc1c149afbf4c8996fb92427ae41e4649b934ca495991b7852b855",
+      },
+      "size": 0,
     },
     "file0.txt": {
-      "size": "<size>",
+      "integrity": {
+        "algorithm": "SHA256",
+        "blockSize": 4194304,
+        "blocks": [
+          "41a978be88ff87a57308bf234106a57ebf9aa0971e2101e75113547a815be72b",
+        ],
+        "hash": "41a978be88ff87a57308bf234106a57ebf9aa0971e2101e75113547a815be72b",
+      },
+      "size": 13,
     },
   },
 }
@@ -39,28 +87,68 @@ exports[`command line interface > should create archive from directory with unpa
     "dir1": {
       "files": {
         "file1.txt": {
-          "size": "<size>",
+          "integrity": {
+            "algorithm": "SHA256",
+            "blockSize": 4194304,
+            "blocks": [
+              "420149d3f852894ba7f32e9d3ec7d8919ee2451724bf2580b0186cd373bd6d82",
+            ],
+            "hash": "420149d3f852894ba7f32e9d3ec7d8919ee2451724bf2580b0186cd373bd6d82",
+          },
+          "size": 9,
         },
       },
     },
     "dir2": {
       "files": {
         "file2.png": {
-          "size": "<size>",
+          "integrity": {
+            "algorithm": "SHA256",
+            "blockSize": 4194304,
+            "blocks": [
+              "cc402b796dc92b2b1f3a6d09515003d8400e63d8acaffc967e49c0cf015fcffe",
+            ],
+            "hash": "cc402b796dc92b2b1f3a6d09515003d8400e63d8acaffc967e49c0cf015fcffe",
+          },
+          "size": 182,
           "unpacked": true,
         },
         "file3.txt": {
-          "size": "<size>",
+          "integrity": {
+            "algorithm": "SHA256",
+            "blockSize": 4194304,
+            "blocks": [
+              "a665a45920422f9d417e4867efdc4fb8a04a1f3fff1fa07e998e86f7f7a27ae3",
+            ],
+            "hash": "a665a45920422f9d417e4867efdc4fb8a04a1f3fff1fa07e998e86f7f7a27ae3",
+          },
+          "size": 3,
           "unpacked": true,
         },
       },
       "unpacked": true,
     },
     "emptyfile.txt": {
-      "size": "<size>",
+      "integrity": {
+        "algorithm": "SHA256",
+        "blockSize": 4194304,
+        "blocks": [
+          "e3b0c44298fc1c149afbf4c8996fb92427ae41e4649b934ca495991b7852b855",
+        ],
+        "hash": "e3b0c44298fc1c149afbf4c8996fb92427ae41e4649b934ca495991b7852b855",
+      },
+      "size": 0,
     },
     "file0.txt": {
-      "size": "<size>",
+      "integrity": {
+        "algorithm": "SHA256",
+        "blockSize": 4194304,
+        "blocks": [
+          "41a978be88ff87a57308bf234106a57ebf9aa0971e2101e75113547a815be72b",
+        ],
+        "hash": "41a978be88ff87a57308bf234106a57ebf9aa0971e2101e75113547a815be72b",
+      },
+      "size": 13,
     },
   },
 }
@@ -83,28 +171,68 @@ exports[`command line interface > should create archive from directory with unpa
     "dir1": {
       "files": {
         "file1.txt": {
-          "size": "<size>",
+          "integrity": {
+            "algorithm": "SHA256",
+            "blockSize": 4194304,
+            "blocks": [
+              "420149d3f852894ba7f32e9d3ec7d8919ee2451724bf2580b0186cd373bd6d82",
+            ],
+            "hash": "420149d3f852894ba7f32e9d3ec7d8919ee2451724bf2580b0186cd373bd6d82",
+          },
+          "size": 9,
         },
       },
     },
     "dir2": {
       "files": {
         "file2.png": {
-          "size": "<size>",
+          "integrity": {
+            "algorithm": "SHA256",
+            "blockSize": 4194304,
+            "blocks": [
+              "cc402b796dc92b2b1f3a6d09515003d8400e63d8acaffc967e49c0cf015fcffe",
+            ],
+            "hash": "cc402b796dc92b2b1f3a6d09515003d8400e63d8acaffc967e49c0cf015fcffe",
+          },
+          "size": 182,
           "unpacked": true,
         },
         "file3.txt": {
-          "size": "<size>",
+          "integrity": {
+            "algorithm": "SHA256",
+            "blockSize": 4194304,
+            "blocks": [
+              "a665a45920422f9d417e4867efdc4fb8a04a1f3fff1fa07e998e86f7f7a27ae3",
+            ],
+            "hash": "a665a45920422f9d417e4867efdc4fb8a04a1f3fff1fa07e998e86f7f7a27ae3",
+          },
+          "size": 3,
           "unpacked": true,
         },
       },
       "unpacked": true,
     },
     "emptyfile.txt": {
-      "size": "<size>",
+      "integrity": {
+        "algorithm": "SHA256",
+        "blockSize": 4194304,
+        "blocks": [
+          "e3b0c44298fc1c149afbf4c8996fb92427ae41e4649b934ca495991b7852b855",
+        ],
+        "hash": "e3b0c44298fc1c149afbf4c8996fb92427ae41e4649b934ca495991b7852b855",
+      },
+      "size": 0,
     },
     "file0.txt": {
-      "size": "<size>",
+      "integrity": {
+        "algorithm": "SHA256",
+        "blockSize": 4194304,
+        "blocks": [
+          "41a978be88ff87a57308bf234106a57ebf9aa0971e2101e75113547a815be72b",
+        ],
+        "hash": "41a978be88ff87a57308bf234106a57ebf9aa0971e2101e75113547a815be72b",
+      },
+      "size": 13,
     },
   },
 }
@@ -127,7 +255,15 @@ exports[`command line interface > should create archive from directory with unpa
     "x1": {
       "files": {
         "file1.txt": {
-          "size": "<size>",
+          "integrity": {
+            "algorithm": "SHA256",
+            "blockSize": 4194304,
+            "blocks": [
+              "be4f0d7f4574cda8a2c7b45495a252df4ed0ceaf8eedb692fb00e3409444b591",
+            ],
+            "hash": "be4f0d7f4574cda8a2c7b45495a252df4ed0ceaf8eedb692fb00e3409444b591",
+          },
+          "size": 8,
           "unpacked": true,
         },
       },
@@ -136,7 +272,15 @@ exports[`command line interface > should create archive from directory with unpa
     "x2": {
       "files": {
         "file2.txt": {
-          "size": "<size>",
+          "integrity": {
+            "algorithm": "SHA256",
+            "blockSize": 4194304,
+            "blocks": [
+              "586ea213ecd662832d578a6d53b84f34a44df8a5d23555215ec11dbd708dfdb6",
+            ],
+            "hash": "586ea213ecd662832d578a6d53b84f34a44df8a5d23555215ec11dbd708dfdb6",
+          },
+          "size": 8,
           "unpacked": true,
         },
       },
@@ -145,12 +289,28 @@ exports[`command line interface > should create archive from directory with unpa
     "y3": {
       "files": {
         "file3.txt": {
-          "size": "<size>",
+          "integrity": {
+            "algorithm": "SHA256",
+            "blockSize": 4194304,
+            "blocks": [
+              "33e658c933a8d7ac2706b5ea44d0887c9a6617d33c89cfd7aa8a8a5043c5577e",
+            ],
+            "hash": "33e658c933a8d7ac2706b5ea44d0887c9a6617d33c89cfd7aa8a8a5043c5577e",
+          },
+          "size": 10,
         },
         "x1": {
           "files": {
             "file4.txt": {
-              "size": "<size>",
+              "integrity": {
+                "algorithm": "SHA256",
+                "blockSize": 4194304,
+                "blocks": [
+                  "dbeebbfbd66e243dd5c2e2fd96d83318269c89d99ebb0aa1a5a1f027092db5e1",
+                ],
+                "hash": "dbeebbfbd66e243dd5c2e2fd96d83318269c89d99ebb0aa1a5a1f027092db5e1",
+              },
+              "size": 9,
               "unpacked": true,
             },
           },
@@ -161,7 +321,15 @@ exports[`command line interface > should create archive from directory with unpa
             "x2": {
               "files": {
                 "file5.txt": {
-                  "size": "<size>",
+                  "integrity": {
+                    "algorithm": "SHA256",
+                    "blockSize": 4194304,
+                    "blocks": [
+                      "74abc479d95c489f300f18086bcab63f188b89f6d309725ea613cf6a8d487a88",
+                    ],
+                    "hash": "74abc479d95c489f300f18086bcab63f188b89f6d309725ea613cf6a8d487a88",
+                  },
+                  "size": 9,
                   "unpacked": true,
                 },
               },
@@ -176,7 +344,15 @@ exports[`command line interface > should create archive from directory with unpa
         "w1": {
           "files": {
             "file6.txt": {
-              "size": "<size>",
+              "integrity": {
+                "algorithm": "SHA256",
+                "blockSize": 4194304,
+                "blocks": [
+                  "10ad5315269b2145a0990eeb305f792c522f5d8efda2c58e180fbfed5be231cd",
+                ],
+                "hash": "10ad5315269b2145a0990eeb305f792c522f5d8efda2c58e180fbfed5be231cd",
+              },
+              "size": 8,
             },
           },
         },
@@ -223,7 +399,15 @@ exports[`command line interface > should create archive from directory with unpa
     "x1": {
       "files": {
         "file1.txt": {
-          "size": "<size>",
+          "integrity": {
+            "algorithm": "SHA256",
+            "blockSize": 4194304,
+            "blocks": [
+              "be4f0d7f4574cda8a2c7b45495a252df4ed0ceaf8eedb692fb00e3409444b591",
+            ],
+            "hash": "be4f0d7f4574cda8a2c7b45495a252df4ed0ceaf8eedb692fb00e3409444b591",
+          },
+          "size": 8,
           "unpacked": true,
         },
       },
@@ -232,7 +416,15 @@ exports[`command line interface > should create archive from directory with unpa
     "x2": {
       "files": {
         "file2.txt": {
-          "size": "<size>",
+          "integrity": {
+            "algorithm": "SHA256",
+            "blockSize": 4194304,
+            "blocks": [
+              "586ea213ecd662832d578a6d53b84f34a44df8a5d23555215ec11dbd708dfdb6",
+            ],
+            "hash": "586ea213ecd662832d578a6d53b84f34a44df8a5d23555215ec11dbd708dfdb6",
+          },
+          "size": 8,
           "unpacked": true,
         },
       },
@@ -241,12 +433,28 @@ exports[`command line interface > should create archive from directory with unpa
     "y3": {
       "files": {
         "file3.txt": {
-          "size": "<size>",
+          "integrity": {
+            "algorithm": "SHA256",
+            "blockSize": 4194304,
+            "blocks": [
+              "33e658c933a8d7ac2706b5ea44d0887c9a6617d33c89cfd7aa8a8a5043c5577e",
+            ],
+            "hash": "33e658c933a8d7ac2706b5ea44d0887c9a6617d33c89cfd7aa8a8a5043c5577e",
+          },
+          "size": 10,
         },
         "x1": {
           "files": {
             "file4.txt": {
-              "size": "<size>",
+              "integrity": {
+                "algorithm": "SHA256",
+                "blockSize": 4194304,
+                "blocks": [
+                  "dbeebbfbd66e243dd5c2e2fd96d83318269c89d99ebb0aa1a5a1f027092db5e1",
+                ],
+                "hash": "dbeebbfbd66e243dd5c2e2fd96d83318269c89d99ebb0aa1a5a1f027092db5e1",
+              },
+              "size": 9,
             },
           },
         },
@@ -255,7 +463,15 @@ exports[`command line interface > should create archive from directory with unpa
             "x2": {
               "files": {
                 "file5.txt": {
-                  "size": "<size>",
+                  "integrity": {
+                    "algorithm": "SHA256",
+                    "blockSize": 4194304,
+                    "blocks": [
+                      "74abc479d95c489f300f18086bcab63f188b89f6d309725ea613cf6a8d487a88",
+                    ],
+                    "hash": "74abc479d95c489f300f18086bcab63f188b89f6d309725ea613cf6a8d487a88",
+                  },
+                  "size": 9,
                 },
               },
             },
@@ -268,7 +484,15 @@ exports[`command line interface > should create archive from directory with unpa
         "w1": {
           "files": {
             "file6.txt": {
-              "size": "<size>",
+              "integrity": {
+                "algorithm": "SHA256",
+                "blockSize": 4194304,
+                "blocks": [
+                  "10ad5315269b2145a0990eeb305f792c522f5d8efda2c58e180fbfed5be231cd",
+                ],
+                "hash": "10ad5315269b2145a0990eeb305f792c522f5d8efda2c58e180fbfed5be231cd",
+              },
+              "size": 8,
             },
           },
         },
@@ -301,7 +525,15 @@ exports[`command line interface > should create archive from directory with unpa
     "x1": {
       "files": {
         "file1.txt": {
-          "size": "<size>",
+          "integrity": {
+            "algorithm": "SHA256",
+            "blockSize": 4194304,
+            "blocks": [
+              "be4f0d7f4574cda8a2c7b45495a252df4ed0ceaf8eedb692fb00e3409444b591",
+            ],
+            "hash": "be4f0d7f4574cda8a2c7b45495a252df4ed0ceaf8eedb692fb00e3409444b591",
+          },
+          "size": 8,
           "unpacked": true,
         },
       },
@@ -310,7 +542,15 @@ exports[`command line interface > should create archive from directory with unpa
     "x2": {
       "files": {
         "file2.txt": {
-          "size": "<size>",
+          "integrity": {
+            "algorithm": "SHA256",
+            "blockSize": 4194304,
+            "blocks": [
+              "586ea213ecd662832d578a6d53b84f34a44df8a5d23555215ec11dbd708dfdb6",
+            ],
+            "hash": "586ea213ecd662832d578a6d53b84f34a44df8a5d23555215ec11dbd708dfdb6",
+          },
+          "size": 8,
           "unpacked": true,
         },
       },
@@ -319,12 +559,28 @@ exports[`command line interface > should create archive from directory with unpa
     "y3": {
       "files": {
         "file3.txt": {
-          "size": "<size>",
+          "integrity": {
+            "algorithm": "SHA256",
+            "blockSize": 4194304,
+            "blocks": [
+              "33e658c933a8d7ac2706b5ea44d0887c9a6617d33c89cfd7aa8a8a5043c5577e",
+            ],
+            "hash": "33e658c933a8d7ac2706b5ea44d0887c9a6617d33c89cfd7aa8a8a5043c5577e",
+          },
+          "size": 10,
         },
         "x1": {
           "files": {
             "file4.txt": {
-              "size": "<size>",
+              "integrity": {
+                "algorithm": "SHA256",
+                "blockSize": 4194304,
+                "blocks": [
+                  "dbeebbfbd66e243dd5c2e2fd96d83318269c89d99ebb0aa1a5a1f027092db5e1",
+                ],
+                "hash": "dbeebbfbd66e243dd5c2e2fd96d83318269c89d99ebb0aa1a5a1f027092db5e1",
+              },
+              "size": 9,
               "unpacked": true,
             },
           },
@@ -335,7 +591,15 @@ exports[`command line interface > should create archive from directory with unpa
             "x2": {
               "files": {
                 "file5.txt": {
-                  "size": "<size>",
+                  "integrity": {
+                    "algorithm": "SHA256",
+                    "blockSize": 4194304,
+                    "blocks": [
+                      "74abc479d95c489f300f18086bcab63f188b89f6d309725ea613cf6a8d487a88",
+                    ],
+                    "hash": "74abc479d95c489f300f18086bcab63f188b89f6d309725ea613cf6a8d487a88",
+                  },
+                  "size": 9,
                   "unpacked": true,
                 },
               },
@@ -350,7 +614,15 @@ exports[`command line interface > should create archive from directory with unpa
         "w1": {
           "files": {
             "file6.txt": {
-              "size": "<size>",
+              "integrity": {
+                "algorithm": "SHA256",
+                "blockSize": 4194304,
+                "blocks": [
+                  "10ad5315269b2145a0990eeb305f792c522f5d8efda2c58e180fbfed5be231cd",
+                ],
+                "hash": "10ad5315269b2145a0990eeb305f792c522f5d8efda2c58e180fbfed5be231cd",
+              },
+              "size": 8,
             },
           },
         },
@@ -397,26 +669,66 @@ exports[`command line interface > should create archive from directory with unpa
     "dir1": {
       "files": {
         "file1.txt": {
-          "size": "<size>",
+          "integrity": {
+            "algorithm": "SHA256",
+            "blockSize": 4194304,
+            "blocks": [
+              "420149d3f852894ba7f32e9d3ec7d8919ee2451724bf2580b0186cd373bd6d82",
+            ],
+            "hash": "420149d3f852894ba7f32e9d3ec7d8919ee2451724bf2580b0186cd373bd6d82",
+          },
+          "size": 9,
         },
       },
     },
     "dir2": {
       "files": {
         "file2.png": {
-          "size": "<size>",
+          "integrity": {
+            "algorithm": "SHA256",
+            "blockSize": 4194304,
+            "blocks": [
+              "cc402b796dc92b2b1f3a6d09515003d8400e63d8acaffc967e49c0cf015fcffe",
+            ],
+            "hash": "cc402b796dc92b2b1f3a6d09515003d8400e63d8acaffc967e49c0cf015fcffe",
+          },
+          "size": 182,
           "unpacked": true,
         },
         "file3.txt": {
-          "size": "<size>",
+          "integrity": {
+            "algorithm": "SHA256",
+            "blockSize": 4194304,
+            "blocks": [
+              "a665a45920422f9d417e4867efdc4fb8a04a1f3fff1fa07e998e86f7f7a27ae3",
+            ],
+            "hash": "a665a45920422f9d417e4867efdc4fb8a04a1f3fff1fa07e998e86f7f7a27ae3",
+          },
+          "size": 3,
         },
       },
     },
     "emptyfile.txt": {
-      "size": "<size>",
+      "integrity": {
+        "algorithm": "SHA256",
+        "blockSize": 4194304,
+        "blocks": [
+          "e3b0c44298fc1c149afbf4c8996fb92427ae41e4649b934ca495991b7852b855",
+        ],
+        "hash": "e3b0c44298fc1c149afbf4c8996fb92427ae41e4649b934ca495991b7852b855",
+      },
+      "size": 0,
     },
     "file0.txt": {
-      "size": "<size>",
+      "integrity": {
+        "algorithm": "SHA256",
+        "blockSize": 4194304,
+        "blocks": [
+          "41a978be88ff87a57308bf234106a57ebf9aa0971e2101e75113547a815be72b",
+        ],
+        "hash": "41a978be88ff87a57308bf234106a57ebf9aa0971e2101e75113547a815be72b",
+      },
+      "size": 13,
     },
   },
 }
@@ -435,7 +747,15 @@ exports[`command line interface > should create archive from directory with unpa
     "dir1": {
       "files": {
         "file1.txt": {
-          "size": "<size>",
+          "integrity": {
+            "algorithm": "SHA256",
+            "blockSize": 4194304,
+            "blocks": [
+              "420149d3f852894ba7f32e9d3ec7d8919ee2451724bf2580b0186cd373bd6d82",
+            ],
+            "hash": "420149d3f852894ba7f32e9d3ec7d8919ee2451724bf2580b0186cd373bd6d82",
+          },
+          "size": 9,
           "unpacked": true,
         },
       },
@@ -445,11 +765,27 @@ exports[`command line interface > should create archive from directory with unpa
         "subdir": {
           "files": {
             "file2.png": {
-              "size": "<size>",
+              "integrity": {
+                "algorithm": "SHA256",
+                "blockSize": 4194304,
+                "blocks": [
+                  "cc402b796dc92b2b1f3a6d09515003d8400e63d8acaffc967e49c0cf015fcffe",
+                ],
+                "hash": "cc402b796dc92b2b1f3a6d09515003d8400e63d8acaffc967e49c0cf015fcffe",
+              },
+              "size": 182,
               "unpacked": true,
             },
             "file3.txt": {
-              "size": "<size>",
+              "integrity": {
+                "algorithm": "SHA256",
+                "blockSize": 4194304,
+                "blocks": [
+                  "a665a45920422f9d417e4867efdc4fb8a04a1f3fff1fa07e998e86f7f7a27ae3",
+                ],
+                "hash": "a665a45920422f9d417e4867efdc4fb8a04a1f3fff1fa07e998e86f7f7a27ae3",
+              },
+              "size": 3,
               "unpacked": true,
             },
           },
@@ -458,14 +794,30 @@ exports[`command line interface > should create archive from directory with unpa
         "subdir-do-not-unpack": {
           "files": {
             "file2.png": {
-              "size": "<size>",
+              "integrity": {
+                "algorithm": "SHA256",
+                "blockSize": 4194304,
+                "blocks": [
+                  "cc402b796dc92b2b1f3a6d09515003d8400e63d8acaffc967e49c0cf015fcffe",
+                ],
+                "hash": "cc402b796dc92b2b1f3a6d09515003d8400e63d8acaffc967e49c0cf015fcffe",
+              },
+              "size": 182,
             },
           },
         },
       },
     },
     "file0.txt": {
-      "size": "<size>",
+      "integrity": {
+        "algorithm": "SHA256",
+        "blockSize": 4194304,
+        "blocks": [
+          "41a978be88ff87a57308bf234106a57ebf9aa0971e2101e75113547a815be72b",
+        ],
+        "hash": "41a978be88ff87a57308bf234106a57ebf9aa0971e2101e75113547a815be72b",
+      },
+      "size": 13,
       "unpacked": true,
     },
   },
@@ -499,25 +851,65 @@ exports[`command line interface > should create archive from directory without h
     "dir1": {
       "files": {
         "file1.txt": {
-          "size": "<size>",
+          "integrity": {
+            "algorithm": "SHA256",
+            "blockSize": 4194304,
+            "blocks": [
+              "420149d3f852894ba7f32e9d3ec7d8919ee2451724bf2580b0186cd373bd6d82",
+            ],
+            "hash": "420149d3f852894ba7f32e9d3ec7d8919ee2451724bf2580b0186cd373bd6d82",
+          },
+          "size": 9,
         },
       },
     },
     "dir2": {
       "files": {
         "file2.png": {
-          "size": "<size>",
+          "integrity": {
+            "algorithm": "SHA256",
+            "blockSize": 4194304,
+            "blocks": [
+              "cc402b796dc92b2b1f3a6d09515003d8400e63d8acaffc967e49c0cf015fcffe",
+            ],
+            "hash": "cc402b796dc92b2b1f3a6d09515003d8400e63d8acaffc967e49c0cf015fcffe",
+          },
+          "size": 182,
         },
         "file3.txt": {
-          "size": "<size>",
+          "integrity": {
+            "algorithm": "SHA256",
+            "blockSize": 4194304,
+            "blocks": [
+              "a665a45920422f9d417e4867efdc4fb8a04a1f3fff1fa07e998e86f7f7a27ae3",
+            ],
+            "hash": "a665a45920422f9d417e4867efdc4fb8a04a1f3fff1fa07e998e86f7f7a27ae3",
+          },
+          "size": 3,
         },
       },
     },
     "emptyfile.txt": {
-      "size": "<size>",
+      "integrity": {
+        "algorithm": "SHA256",
+        "blockSize": 4194304,
+        "blocks": [
+          "e3b0c44298fc1c149afbf4c8996fb92427ae41e4649b934ca495991b7852b855",
+        ],
+        "hash": "e3b0c44298fc1c149afbf4c8996fb92427ae41e4649b934ca495991b7852b855",
+      },
+      "size": 0,
     },
     "file0.txt": {
-      "size": "<size>",
+      "integrity": {
+        "algorithm": "SHA256",
+        "blockSize": 4194304,
+        "blocks": [
+          "41a978be88ff87a57308bf234106a57ebf9aa0971e2101e75113547a815be72b",
+        ],
+        "hash": "41a978be88ff87a57308bf234106a57ebf9aa0971e2101e75113547a815be72b",
+      },
+      "size": 13,
     },
   },
 }
@@ -590,7 +982,15 @@ exports[`command line interface > should unpack static framework with all underl
               },
             },
             "file.txt": {
-              "size": "<size>",
+              "integrity": {
+                "algorithm": "SHA256",
+                "blockSize": 4194304,
+                "blocks": [
+                  "b94d27b9934d3e08a52e52d7da7dabfac484efe37a5380ee9088f7ace2efcde9",
+                ],
+                "hash": "b94d27b9934d3e08a52e52d7da7dabfac484efe37a5380ee9088f7ace2efcde9",
+              },
+              "size": 11,
               "unpacked": true,
             },
           },
diff --git a/test/util/verifySmartUnpack.ts b/test/util/verifySmartUnpack.ts
index b0e54917..f947ed58 100644
--- a/test/util/verifySmartUnpack.ts
+++ b/test/util/verifySmartUnpack.ts
@@ -15,13 +15,6 @@ export function removeUnstableProperties(data: any) {
       if (name === 'offset') {
         return undefined;
       }
-      if (value.size != null) {
-        // size differs on various OS and subdependencies aren't pinned, so this will randomly fail when subdependency resolution versions change
-        value.size = '<size>';
-      }
-      if (value.integrity) {
-        delete value.integrity;
-      }
       return value;
     }),
   );