Compress PDF
Make your PDF smaller and easier to share.
Opening your local workspace…
How to use Compress PDF
Make your PDF smaller and easier to share. Everything is processed in this browser.
- 01
Open a PDF and choose a compression method.
- 02
Lossless compression keeps text selectable. Image compression can reduce scanned documents more, but rasterizes the pages.
- 03
Download the result. An already compact original is kept when compression would make it larger.
Supported files
PDF. Results are generated locally. Device memory and browser format support determine practical limits.
Your files, on your device
Unlimited use with no daily quotas. No account, subscription, database or automatic watermark. Files are held in memory while you work. The app can cache its code and bundled models for offline use.
Peer tools share only with the device you choose to pair. Read the privacy details.
Common questions
Is Compress PDF free to use?
Yes. OhhPDF has no signup, paid tier, processing fee or daily usage quota. Device memory and each tool’s format and resolution limits still apply.
Do my files get uploaded?
No. Processing runs on your device. If you choose the P2P sharing or whiteboard tools, data goes directly to the peer you pair.
Can I use it offline?
Load the tool and any required model once while online. Once its assets are cached, supported browsers can reuse them offline. Clearing site data removes that cache.