Compress PDF
Drop a PDF file here or click to browse
Reduce PDF file size by re-rendering pages as compressed images
How it works
1
Upload your PDF
Drop your PDF or click to browse. Works with any size PDF.
2
Choose quality level
Pick Low, Medium, or High compression to balance file size and quality.
3
Download compressed PDF
Your smaller PDF downloads instantly. Nothing is uploaded anywhere.
Why Mutari?
- ✓ Your files never leave your browser. No server processing, ever
- ✓ Works offline once the page loads
- ✓ No account, no signup, completely free
- ✓ Powered by WebAssembly for fast, native-speed processing
Unlike cloud-based tools
Most online PDF tools upload your files to their servers for processing. Mutari is different: everything runs in your browser using WebAssembly. No file ever leaves your device, which means no privacy risk, no upload wait time, and no file size restrictions imposed by server limits.
Frequently asked questions
How much can I reduce the file size?
It depends on the content. PDFs with large images compress significantly, often 50-80% smaller. Text-heavy PDFs see smaller reductions.
Does compression affect text quality?
Pages are re-rendered as compressed JPEG images, so text is no longer selectable in the output. Visual quality depends on the compression level you choose.
What compression levels are available?
Three presets: Low (minimal compression, best quality), Medium (balanced), and High (maximum compression, lower quality). Choose based on your needs.