LeanImg is a free online image toolkit with 6 tools. Five tools process images entirely in your browser using WebAssembly codecs and the Canvas API — no files are uploaded. The sixth (background removal) uses a server-side AI model for state-of-the-art quality.
Tools:
- Image Compressor — Compress JPEG, PNG, WebP, and AVIF images with smart presets or manual quality control. Uses production-grade codecs (MozJPEG, OxiPNG, libwebp, libavif — same as Google's Squoosh). Batch processing, ZIP download.
- Image Resizer — Resize images to exact dimensions, percentages, or social media presets (Instagram, Facebook, Twitter). Bulk resize in seconds.
- Image Cropper — Crop images with an interactive visual editor. Freeform crop, 7 aspect ratio presets (1:1, 4:3, 3:2, 16:9, and more), or custom ratios. Supports JPG, PNG, WebP, AVIF, and GIF.
- Image Converter — Convert between JPG, PNG, WebP, AVIF, HEIC, GIF, SVG, TIFF, BMP, ICO, and PDF. 50+ conversion pairs available.
- Favicon Generator — Generate a complete favicon package from any image: favicon.ico (multi-resolution), PNG icons, Apple Touch icon, Android Chrome icons, and site.webmanifest — all in a single ZIP download.
- Background Remover — AI-powered background removal using BiRefNet (state-of-the-art, MIT licensed). Unlimited free processing at full resolution, batch support, transparent PNG output. No per-image fees, no watermarks.
