Free Online File Compressor — Compress Images and PDFs in Your Browser
FileSlim is a free online file compressor that shrinks JPEG, PNG, WebP, AVIF images and PDF documents by up to 90% — entirely in your browser. No server upload, no signup, complete privacy.
✓ 100% Private & Secure
Files never leave your device — zero data breaches
⚡ Browser-Based Compression
WebAssembly-powered, works offline after first load
Compression Tools
- • Online File Compressor — professional-grade image & PDF compression
- • Compress Files Online — step-by-step guide to reducing file sizes
- • Free File Compression — no limits, no watermarks, free forever
- • Compress Image to 100KB — hit exact file size targets
- • Compress PDF to 1MB — reduce PDF sizes for email
- • Reduce Image Size for Web — optimize images for faster websites