A free, open-source online image compressor. Reduce JPG, PNG, and WebP file size in your browser. No server, no signup, no data leaves your device.
Live demo: vaultool.com/tools/image-compressor.html
- Quality Control — Adjust compression quality (10%–100%)
- Format Conversion — Convert to JPEG, PNG, or WebP
- Resize — Set max width to resize images during compression
- Batch Processing — Compress multiple images at once
- Preview — See original vs compressed size in real-time
- One-click Download — Download compressed files individually
- Privacy First — 100% client-side processing
- Zero Dependencies — Single HTML file, no build step required
Just open index.html in any modern browser. No installation needed.
- Vanilla HTML/CSS/JavaScript
- Canvas API for image processing
- Zero dependencies
- No build tools required
MIT License — free for personal and commercial use.
This is part of the Vaultool free online toolbox — 30+ tools for PDF, image, text processing, and developer utilities.