Compress PDF Online Free
Make a heavy PDF smaller without leaving your browser. Great for scans, photo-filled reports and design exports that are too big to email or upload. Pick how hard to compress, see the new size, and download — your file is never uploaded.
Your files never leave your device. All processing happens locally in your browser.
Drag & drop your PDF here
or click to browse
Files never leave your device
Up to 50MB per file
Why use this tool
Real Size Savings
Heavy scans and image-rich PDFs are re-encoded at a sensible resolution, often cutting file size by half or more.
100% Private
Files are processed entirely in your browser using the Canvas and WebAssembly APIs. Nothing is ever uploaded to a server.
You Choose the Trade-off
Three levels let you balance file size against quality, with the resulting size shown before you download.
Free Forever
No account, no watermark, no daily limits. Every tool on PixelResize is free to use as often as you like.
How Compress PDF compares
| Feature | PixelResize | Typical PDF compressors |
|---|---|---|
| Where the PDF is processed | In your browser, on your device | Uploaded to their servers |
| Document privacy | Never leaves your device | Stored on a server temporarily |
| Daily limits | None — compress as often as you like | Free-tier caps |
| Watermark or sign-up | Neither required | Often one or both |
How to compress pdf
- 1
Upload the PDF you want to shrink.
- 2
Pick a compression level — high, balanced or light.
- 3
We re-encode each page locally and show the new size.
- 4
Download your smaller PDF.
Frequently asked questions
Related tools & sizes
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