GitHub Action to compress and resize images with the Tinify API.

• filters PNG, JPEG, and WebP files in a commit or pull request
• optionally scales images proportionally
• sets Exif metadata to prevent duplicate compressions
• pushes commit with compression metrics

For example, on pull_request events with modified files inside the static directory:

name: Compress Images

on:
  pull_request:
    paths:
      - 'static/**'

jobs:
  compress:
    runs-on: ubuntu-latest
    steps:
      - uses: actions/checkout@v4
        with:
          ref: ${{ github.head_ref }}
      - uses: namoscato/action-tinify@v1
        with:
          api_key: ${{ secrets.TINIFY_API_KEY }}

The following webhook events are supported:

• pull_request
• push

Events triggered by a default GITHUB_TOKEN commit will not create a new workflow run to prevent accidental recursion.

If you are sure that you want the compression commit to trigger a workflow run, you can configure actions/checkout with a personal access token:

- uses: actions/checkout@v4
  with:
    ref: ${{ github.head_ref }}
    token: ${{ secrets.PERSONAL_ACCESS_TOKEN }}