CropTransparent

Trims the empty edges off your images: transparent borders, flat backgrounds, and empty SVG space.

Screenshots

Mobile

Features

• Transparent edges: PNG, GIF and WEBP are trimmed to the bounds of their alpha channel.
• Flat backgrounds: JPEGs and opaque images lose any uniform border detected from the corners, without leaving a compression fringe.
• Animated images: every frame of a GIF, WEBP or APNG is cropped to one shared box, so the animation stays intact.
• SVGs stay vector: the viewBox is tightened to the content, paths are untouched.
• Batch friendly: drop, browse or paste (Ctrl+V) several images at once, then download one or all as a ZIP.
• Private: images are processed in memory and never written to disk.

Quick start

docker run -p 5000:5000 ghcr.io/pianonic/croptransparent:latest

Open http://localhost:5000.

Documentation

• Self-hosting: Docker Compose, Docker and updating
• Configuration: environment variables and limits
• API: cropping images without the UI
• Development: running from source, tests and linting
• Architecture: how the code is organised
• Releasing: how versions and images are published

License

MIT