Lossless Image Resizer & Converter

Resize many images at once, export PNG and WebP losslessly, and convert between JPG, PNG and WebP. WebAssembly codecs run inside your browser, so your images are never uploaded to a server.

• Lossless PNG optimization with oxipng (Rust compiled to WebAssembly)
• Lossless WebP at quality 100 with libwebp
• Nothing is uploaded: all processing happens in your browser
• Batch resize: add several images and download them as a single ZIP
• Supports JPG, PNG, WebP, GIF, BMP, AVIF, SVG, HEIC and HEIF; lock the aspect ratio or set exact dimensions