# chrissimpkins/Crunch

Insane(ly slow but wicked good) PNG image optimization

Repository: https://github.com/chrissimpkins/Crunch
Canonical: https://ross.abutalabs.com/products/crunch
Language: Python
License: NOASSERTION
License Family: other
Topics: png, png-compression, compression, image-quality, image-processing, images, image, image-compression, pngquant, zopflipng, macos, lossy, lossy-compression
Last push: 2022-06-18T12:20:17+00:00

## Health v2 (maintenance only)
Score: 23/100 (v2, computed 2026-09-02T17:46:02.011165+00:00)
- activity 0, release rhythm 8, longevity 100
- inputs: {"age_days": 3797, "days_push": 1537, "days_rel": null, "gap_med": null, "n_releases_24m": 0}
- flags: no_license
- formula: round(0.45*activity + 0.35*rhythm + 0.20*longevity); archived -> min(score, 10)

## Adoption (not part of the score)
Stars 3425, forks 150 (observed 2026-08-28T04:08:03.905895+00:00)

## What it is
Crunch is a lossy PNG image optimization tool that combines bit depth, color type, and palette reduction with zopfli DEFLATE compression via pngquant and zopflipng. It ships as a command line executable, a native macOS drag-and-drop GUI app, and a macOS Finder right-click service.

## Use cases
- compress png images to smaller file sizes
- optimize pngs for web performance
- batch shrink png files from the command line
- reduce png size with minimal quality loss
- drag and drop png compression on mac
- optimize images before deploying a website

## When to choose
- you need maximum PNG size reduction and can tolerate slight lossy quality reduction
- you want a simple CLI or macOS GUI for PNG optimization
- lossless optimizers like optipng are not shrinking your PNGs enough

## When to avoid
- you require strictly lossless PNG compression
- you need fast batch processing - the zopfli-based approach is intentionally slow
- you need optimization of formats other than PNG

## Facets
- artifact type: cli-tool
- maturity: maintenance
- function: image-processing, compression
- domain: image-processing, files, developer-tools
- platform: windows, cli, python
- tags: png-optimization, lossy-compression, pngquant, zopflipng, zopfli, gui, macos-service, macos, linux

## Member repositories
- chrissimpkins/Crunch (main) score 23

## Provenance
- Observed fields: from GitHub, fetched 2026-08-28T04:08:03.905895+00:00.
- Health v2: computed from the inputs above; adoption is never an input.
- Inferred fields (summary, facets, guidance): AI-extracted, prompt v1, taxonomy v1, on 2026-08-29T18:38:04.165023+00:00, confidence not recorded.
  - readme: https://github.com/chrissimpkins/Crunch (fetched 2026-08-28T04:08:03.905895+00:00, sha 64bc6b6dee5a)
- Data as of 2026-08-30T08:39:29.467469+00:00.