🗜️ Compress PDF
Reduce PDF file size while maintaining quality • Smaller files, faster sharing
Compress PDF File
Choose PDF File
Drag & drop or click to browse
Up to 70% Smaller
Significantly reduce file size while keeping good quality
Adjustable Quality
Choose between smaller size or better quality
Email Ready
Perfect for email attachments and online uploads
100% Private
All compression happens in your browser - nothing uploaded
Compress PDF files online for free with MonkeyPDF. Reduce PDF file size by up to 95% while maintaining document quality. Our secure browser-based PDF compressor works on Windows, Mac, Android, and iPhone with no registration or software installation required..
How to Compress a PDF Online
Three steps, all in your browser — no upload to a server required:
1. Choose your file
Drag and drop a PDF, or click to browse.
2. Set compression quality
Slide between better quality and smaller size.
3. Compress & download
Get your smaller PDF in seconds.
Choosing a Compression Level
The slider trades off file size against visual quality. As a guide:
Compress Tool at a Glance
| Price | Free, unlimited use |
| Account required | No |
| Where files are processed | Locally in your browser — not uploaded to a server |
| Typical size reduction | Up to 70%, depending on content and quality setting |
| Max file size | e.g. up to 100 MB per file |
| Supported platforms | Windows, macOS, Linux, Android, iOS |
| File retention | Not applicable — files never leave your device |
Why Use MonkeyPDF to Compress PDFs
- Up to 95% smaller: significantly reduce file size while keeping good quality.
- Adjustable quality: choose between a smaller file or sharper output.
- Email-ready: get under attachment size limits without a separate file-sharing link.
- 100% private: compression happens in your browser — nothing is uploaded.
- Free and unrestricted: no account, no watermark, no hidden fees.
More Free PDF Tools
Frequently Asked Questions
Yes. Compress PDF files online for free, with no account or subscription required.
Typically up to 95% smaller, depending on your file’s content and the compression level you choose.
Some quality loss is possible at higher compression, which is why MonkeyPDF gives you a slider — pick Better Quality if the file will be printed, or Smaller Size if it’s just for email or web sharing.
No. Compression happens locally in your browser, so your document never leaves your device.
State the real limit here, e.g. There’s no limit or Up to 100 MB per file.