v0.2.1

imageopt — cross-platform image optimizer (CLI + GitHub Action)

A fast, reliable, single-binary image optimizer in the spirit of ImageOptim —
optimizes JPEG, PNG, GIF, WebP and SVG in place, reports how much space was
saved, and is built for CI automation. No runtime dependencies; all codecs are
compiled in.

Highlights

• Lossless by default, opt-in lossy (--lossy / -q).
• Safe to run on every push: lossless is deterministic and idempotent, and
  lossy converges after one pass (--min-savings), so a commit-back workflow
  won't keep rewriting or degrading images.
• Never corrupts or enlarges a file: every re-encode is re-decoded and
  validated, the smallest valid result wins, and writes are atomic.
• Cross-platform prebuilt binaries: macOS (arm64/x64), Linux (x64/arm64),
  Windows (x64), each with a SHA256 checksum.

Changes in 0.2.1

• Renamed the Action to Newmatik Image Optimizer for the GitHub Marketplace
  listing (the uses: newmatik/image-optimizer@… reference is unchanged) and
  sharpened the listing description. No functional changes vs 0.2.0.

Use the Action

- uses: actions/checkout@v4
- uses: newmatik/image-optimizer@v0.2.1
  with:
    paths: "src/assets"
    recursive: "true"
# optionally commit the result back, or add `check: "true"` to gate a PR

Install the CLI

Download the binary for your platform from the assets below, or build from source
(cargo install --path crates/cli). Licensed GPL-3.0-or-later.