Image Optimizer

A small, fast desktop app for optimizing images and converting between formats — including HEIC (iPhone photos) → PNG/JPEG/WebP — by dragging and dropping files onto the window. Built with Tauri (Rust) + Svelte for a tiny, native-feeling app instead of a bundled-Chromium Electron app.

Stack

• Tauri v2 — Rust backend, native OS webview (small binaries, low memory)
• Svelte 5 / SvelteKit (SPA mode) — UI
• image — decode/encode PNG, JPEG, WebP, GIF, BMP, TIFF
• heic — pure-Rust HEIC/HEIF decoder (no C deps)
• oxipng — lossless PNG recompression pass

Develop

npm install
npm run tauri dev

Test

cd src-tauri && cargo test

Design

The UI is a small Linear-inspired dark-mode design system (src/lib/tokens.css) with motion designed to represent each stage of the image pipeline: a staggered "pop + settle" entrance for dropped files, a shimmer "scan" while decoding/converting, a progress fill that crossfades from accent-tint to accent, and a checkmark pop on completion.

License

The heic crate this project depends on is licensed AGPL-3.0-only (or a commercial license from Imazen). Accordingly, this project is open source under AGPL-3.0 — see LICENSE.