Large PDFs are slow to email and take up too much storage. Our Compress PDF tool reduces file size by up to 90% while preserving text clarity and image quality — all processed locally on your machine.
or click to browse. Processing happens 100% in your browser.
🔒 Your file stays on your device. We never see it.
Select your PDF.
Our engine compresses images and fonts.
Get your smaller file instantly.
Drastically reduce file sizes.
Keep text crisp and images clear.
Processed locally in your browser.
Chrome, Firefox, Safari, Edge.
50MB file • Slow email • Cloud risk
5MB file • Instant send • 100% private
| Compression Ratio | Up to 90% |
|---|---|
| Quality | Lossless / 300 DPI |
| Method | WebAssembly streaming |
| Processing Method | WebAssembly (WASM) |
| Browser Memory | < 512MB allocated |
| Supported PDF Versions | 1.4 through 2.0 |
| Output Quality | Lossless / 300 DPI |
| Feature | PDFDocStudio | Cloud Competitors |
|---|---|---|
| File Uploads | ❌ Never | ✅ Required |
| Account Needed | ❌ No | ✅ Often |
| HIPAA Friendly | ✅ Yes | ⚠️ BAA Required |
| Max File Size | 50MB | Varies |
| Price | Free | Freemium |
Yes. Our Merge, Compress, and Convert tools support batch processing directly in your browser. Simply select multiple files (Ctrl+Click or Cmd+Click) in the file picker.
Browser memory constraints cap safe WebAssembly processing at ~50MB per file. Larger files risk crashing the tab. We're optimizing streaming algorithms to raise this to 200MB.
Never. Free outputs are identical to paid outputs. No watermarks, no ads injected into PDFs, no quality reduction.
Since processing is local, a crash only affects the current session. Your original file remains untouched on your hard drive. Simply reopen the tool and re-upload.
100% free. 100% private. 100% in your browser.
Compress Your PDF Now