Crop PDF Margins
Automatically detect and remove white margins from every page — bigger text on Kindle, reMarkable and tablets. Lossless, free, and files never leave your browser.
Drop your PDF here
or click to choose a file — no size limit, no signup
🔒 Your files never leave your device.
How it works
- Drop your PDF into the box above.
- The white margins on every page are detected automatically and trimmed evenly across the document.
- Download the cropped PDF — the change is lossless and reversible.
Frequently asked questions
Does cropping reduce quality?
No. Nothing is re-compressed or redrawn — the empty margins are simply hidden from view. Quality stays exactly the same, and you can undo it at any time.
How does automatic margin detection work?
The tool looks at every page to see where the actual content starts and ends, then trims the same amount of white space from all pages so the document stays uniform.
Why crop margins for an e-reader?
Papers and ebooks often have wide margins. Removing them makes the text substantially larger on Kindle, reMarkable, Onyx Boox and tablets without zooming on every page.
Is my PDF uploaded anywhere?
No. Everything happens on your device — nothing is sent anywhere.