I rebuilt my old image processing library with Rust + WebAssembly

#rust #webassembly #webdev #javascript

Rebuilding an old browser image library with Rust + WebAssembly

I originally started this project as a small practice project for two things:

publishing a library
learning Rust + WebAssembly in a real workflow

I paused it for a while, and recently came back to improve it properly: img-toolkit.

It’s a browser image processing library with a Rust/WASM core and a JS/TS wrapper.

resize
format convert (jpg/png/webp)
brightness adjustment

GitHub: https://github.com/2YH02/img-toolkit
Demo: https://2yh02.github.io/img-toolkit
npm: https://www.npmjs.com/package/img-toolkit

Why I restarted it

I wanted to turn it from a simple practice repo into something cleaner and actually usable.

Recent improvements

API cleanup with clearer function boundaries:
- processImage
- resize
- convertFormat
- adjustBrightness
Better WebP behavior across runtime environments
Cleaner user-facing error behavior
Documentation and release process improvements

Quick comparison (same source image)

Original: 747 KB
JS canvas output: 49.3 KB
Rust/WASM output: 41.3 KB

(Comparison images are in the README.)

It’s still a work in progress, but it’s now much more usable than before.

If you try it, I’d really appreciate feedback on API design and real-world use cases.