diff --git a/.markdownlint.json b/.markdownlint.json
index d2976f3..601cca2 100644
--- a/.markdownlint.json
+++ b/.markdownlint.json
@@ -1,5 +1,7 @@
 {
   "MD013": false,
   "MD024": false,
-  "MD028": false
+  "MD028": false,
+  "MD032": false,
+  "MD033": false
 }
diff --git a/README.md b/README.md
index e69de29..756be6a 100644
--- a/README.md
+++ b/README.md
@@ -0,0 +1,150 @@
+
+# JSON to Variables Setter
+
+## Overview
+
+**JSON to Variables Setter (json2vars-setter)** is a GitHub Action designed to parse a JSON file and set the resulting variables (such as operating systems, Python versions, and GitHub Pages branch) as outputs in a GitHub Actions workflow.
+
+## Table of contents
+
+- [JSON to Variables Setter](#json-to-variables-setter)
+  - [Overview](#overview)
+  - [Table of contents](#table-of-contents)
+  - [Usage](#usage)
+    - [Inputs](#inputs)
+    - [Outputs](#outputs)
+  - [Example JSON File](#example-json-file)
+  - [Example Workflow](#example-workflow)
+  - [License](#license)
+
+## Usage
+
+This action reads a JSON file (default path: `.github/workflows/matrix.json`) and sets GitHub Actions outputs based on the parsed data.
+
+> [!NOTE]
+> - Please create the JSON file by referring to the [Example JSON File](#example-json-file).
+> - By default, the JSON file path is `.github/workflows/matrix.json`. If you create a custom file, specify it in the `7rikazhexde/json2vars-setter` action.
+> - In the workflow, only the variables specified in the Outputs section are available.
+
+### Inputs
+
+| Input             | Description                                                        | Required |
+|-------------------|--------------------------------------------------------------------|----------|
+| `json-file`       | Path to the JSON file.<br>Default: `.github/workflows/matrix.json` | No       |
+
+### Outputs
+
+> [!IMPORTANT]  
+> Please chack [Example Workflow](#example-workflow)\
+> (*1): In order to reference them in both steps and jobs, outputs must be specified.\
+> (*2): For lists, explicitly enclose the list in "" to make it a string. (Note that it is not '').
+
+| Input             | Description                |
+|-------------------|----------------------------|
+| `os`              | List of operating systems  |
+| `versions_python` | List of Python versions    |
+| `ghpages_branch`  | GitHub Pages branch name   |
+
+## Example JSON File
+
+Here is an example of a JSON file that can be used with this action
+
+```json
+{
+    "os": [
+        "ubuntu-latest",
+        "windows-latest",
+        "macos-latest"
+    ],
+    "versions": {
+        "python": [
+            "3.10",
+            "3.11",
+            "3.12"
+        ]
+    },
+    "ghpages_branch": "ghgapes"
+}
+```
+
+## Example Workflow
+
+Below is an example of how to use the ***name: Set variables from JSON*** in a GitHub Actions workflow
+
+```yaml
+name: Test on PR by matrix.json (Except Dependabot)
+
+on:
+  pull_request:
+    branches: ["main"]
+
+jobs:
+  set_variables:
+    if: github.actor != 'dependabot[bot]' && !startsWith(github.event.pull_request.title, 'Bump version')
+    runs-on: ubuntu-latest
+    outputs: # (*1)
+      os: ${{ steps.json2vars.outputs.os }}
+      versions_python: ${{ steps.json2vars.outputs.versions_python }}
+      ghpages_branch: ${{ steps.json2vars.outputs.ghpages_branch }}
+    steps:
+      - name: Checkout repository
+        uses: actions/checkout@v4.2.1
+        with:
+          fetch-depth: 0
+
+      - name: Set variables from JSON
+        id: json2vars
+        uses: 7rikazhexde/json2vars-setter@main
+        # Not required if using .github/workflows/matrix.json
+        with:
+          json-file: .github/workflows/python_project_matrix.json
+
+      - name: Debug output values
+        run: |
+          echo "os: ${{ steps.json2vars.outputs.os }}"
+          echo "versions_python: ${{ steps.json2vars.outputs.versions_python }}"
+          echo "ghpages_branch: ${{ steps.json2vars.outputs.ghpages_branch }}"
+
+  run_tests:
+    needs: set_variables
+    strategy:
+      matrix:
+        os: ${{ fromJson(needs.set_variables.outputs.os) }}
+        python-version: ${{ fromJson(needs.set_variables.outputs.versions_python) }}
+    runs-on: ${{ matrix.os }}
+    steps:
+      - name: Checkout repository
+        uses: actions/checkout@v4.2.1
+        with:
+          fetch-depth: 0
+
+      - name: Set up Python
+        uses: actions/setup-python@v5.2.0
+        with:
+          python-version: ${{ matrix.python-version }}
+
+      - name: Show variables
+        shell: bash
+        run: |
+          # For list case
+          ghpages_branch=${{ needs.set_variables.outputs.ghpages_branch }}
+
+          # For lists, explicitly enclose the list in "" to make it a string. (Note that it is not '').(*2)
+          os='${{ needs.set_variables.outputs.os }}'
+          versions_python='${{ needs.set_variables.outputs.versions_python }}'
+
+          echo "os: $os"
+          echo "versions_python: $versions_python"
+          echo "ghpages_branch: $ghpages_branch"
+
+      - name: Run pytest
+        id: pytest
+        shell: bash
+        run: |
+          output=$(poetry run pytest)
+          echo "$output"
+```
+
+## License
+
+This project is licensed under the MIT License - see the [LICENSE](LICENSE) file for details.