diff --git a/.codespellrc b/.codespellrc
new file mode 100644
index 000000000..de6362ee2
--- /dev/null
+++ b/.codespellrc
@@ -0,0 +1,7 @@
+[codespell]
+# Ref: https://github.com/codespell-project/codespell#using-a-config-file
+skip = .git,*.svg,go.sum,*.lock,*.css,.codespellrc
+check-hidden = true
+# ignore-regex = 
+# short variables close to typos are often used
+ignore-words-list = ot
diff --git a/.github/workflows/codespell.yml b/.github/workflows/codespell.yml
new file mode 100644
index 000000000..7c9eafb17
--- /dev/null
+++ b/.github/workflows/codespell.yml
@@ -0,0 +1,23 @@
+# Codespell configuration is within .codespellrc
+---
+name: Codespell
+
+on:
+  push:
+    branches: [main]
+  pull_request:
+    branches: [main]
+
+permissions:
+  contents: read
+
+jobs:
+  codespell:
+    name: Check for spelling errors
+    runs-on: ubuntu-latest
+
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v4
+      - name: Codespell
+        uses: codespell-project/actions-codespell@v2
diff --git a/docs/source/contrib.rst b/docs/source/contrib.rst
index 8763319cb..879e6eb53 100644
--- a/docs/source/contrib.rst
+++ b/docs/source/contrib.rst
@@ -57,7 +57,7 @@ Code Structure
 - ``internal``: Contains the internal code for the project.
 
   - ``web``: Contains the backend code for the Web UI.
-  - ``agent``: Contains the code for runnning the workflows.
+  - ``agent``: Contains the code for running the workflows.
   - ``config``: Contains the code for loading the configuration.
   - ``controller``: Contains the code for managing the workflows.
   - ``dag``: Contains the code for parsing the workflow definition.
diff --git a/docs/source/executors.rst b/docs/source/executors.rst
index d934e7788..7ee5dcd14 100644
--- a/docs/source/executors.rst
+++ b/docs/source/executors.rst
@@ -69,7 +69,7 @@ Running Containers on the Host's Docker Environment
 
 If you are running `dagu` using a container, you need the setup below.
 
-1. Run a `socat` conainer with the command below.
+1. Run a `socat` container with the command below.
 
 .. code-block:: sh
 
diff --git a/docs/source/yaml_format.rst b/docs/source/yaml_format.rst
index f4dcd77c5..9787f886f 100644
--- a/docs/source/yaml_format.rst
+++ b/docs/source/yaml_format.rst
@@ -321,7 +321,7 @@ Example:
         dir: ${HOME}/logs                
         command: bash                    
         stdout: /tmp/outfile
-        ouptut: RESULT_VARIABLE
+        output: RESULT_VARIABLE
         script: |
           echo "any script"
         signalOnStop: "SIGINT"           
diff --git a/internal/persistence/jsondb/database.go b/internal/persistence/jsondb/database.go
index 9af4b2d39..ac48f0901 100644
--- a/internal/persistence/jsondb/database.go
+++ b/internal/persistence/jsondb/database.go
@@ -20,7 +20,7 @@ import (
 	"github.com/dagu-dev/dagu/internal/utils"
 )
 
-// Store is the interfact to store dags status in local.
+// Store is the interface to store dags status in local.
 // It stores status in JSON format in a directory as per each dagFile.
 // Multiple JSON data can be stored in a single file and each data
 // is separated by newline.
diff --git a/internal/utils/utils_test.go b/internal/utils/utils_test.go
index fe464a498..cfa17e5f7 100644
--- a/internal/utils/utils_test.go
+++ b/internal/utils/utils_test.go
@@ -36,10 +36,10 @@ func TestMustGetwd(t *testing.T) {
 
 func TestFormatTime(t *testing.T) {
 	tm := time.Date(2022, 2, 1, 2, 2, 2, 0, time.Now().Location())
-	fomatted := utils.FormatTime(tm)
-	require.Equal(t, "2022-02-01 02:02:02", fomatted)
+	formatted := utils.FormatTime(tm)
+	require.Equal(t, "2022-02-01 02:02:02", formatted)
 
-	parsed, err := utils.ParseTime(fomatted)
+	parsed, err := utils.ParseTime(formatted)
 	require.NoError(t, err)
 	require.Equal(t, tm, parsed)