Crop PDF page margins and borders
WhiskFile Crop PDF is a free online tool to crop PDF page margins and borders. Files are processed entirely in your browser — nothing is uploaded to any server.
Quick Answer
Crop PDF page margins and borders. WhiskFile's Crop PDF is free, works in your browser, and requires no account. Your files never leave your device — all processing happens locally.
Upload your PDF
Upload the PDF you want to crop or extend — drag and drop or click to browse. Works with scanned documents and any page size.
Choose a crop mode
Pick Automatic (uniform crop across all pages), Maximum crop (tightest fit per page), or Preview & select for full manual control.
Adjust the crop area
Drag the 8-handle crop rectangle, enter precise margins in mm/cm/inch/pt, lock an aspect ratio (1:1, 4:3, 16:9), or select a preset page size (A4, Letter).
Fine-tune with tools
Use page thumbnails with crop badges, odd/even page mode, page range filter, undo/redo (30 steps), and keyboard shortcuts to perfect every page.
Download
Download the cropped or extended PDF instantly. CropBox and MediaBox are updated for maximum compatibility.
Max file size: 50 MB (free) · 500 MB (paid). Processing time: ~6s on average. Upload one file at a time.
Crop PDF runs entirely in your browser — no software to install. Works on any device with a modern browser.
Windows & Mac
Chrome, Firefox, Edge, Safari
iPhone & Android
Safari, Chrome mobile
iPad & Tablets
Full touch support
Unlike server-based tools that upload your documents, WhiskFile processes everything locally in your browser. Your files never leave your device — not even temporarily.
No upload required
Files are processed in your browser — nothing is sent to any server
100% private
No server storage, no data collection, no third-party access
Works offline
Once loaded, works without an internet connection
“Filling out PDF forms used to mean printing and scanning. Now I just click and type — so much faster.”
Maria Gonzalez
HR Coordinator
“Adding page numbers and watermarks to client decks takes one click. Clean, professional results every time.”
James Park
Freelance Designer
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Client-side processing
This tool now runs entirely in your browser — files never leave your device.
Result preview & sharing
Preview your processed file before downloading, and share results via a secure link.
Automatic mode renders each page, samples corner pixels to detect background color, then scans for content boundaries. 'Automatic' applies a uniform crop across all pages; 'Maximum crop' trims each page individually for the tightest fit.
Yes. Enter page ranges like 1-5, 8, 10-20 to apply the crop to certain pages while leaving others untouched.
Yes. Switch to Extend mode to add whitespace around the page edges. Choose a fill color. Perfect for binding margins, hole-punch space, or adding annotation room.
6 presets: Free, 1:1 (square), 4:3, 3:4, 16:9, 9:16. When locked, the crop rectangle maintains the ratio as you resize.
Yes. One-click presets for A4, A5, Letter, and Legal. The crop area centers automatically on the page content.
Millimeters (mm), centimeters (cm), inches, and points (pt). A live readout shows the resulting page width and height as you adjust.
Yes. Odd & even mode lets you set one crop for odd pages and a different crop for even pages. Ideal for book-style documents with alternating margin sides.
PDF cropping modifies the CropBox and MediaBox, which changes the visible area. The hidden content may remain in the file data. For full content removal, use our PDF editor to redact or delete it.
Yes. Undo/redo supports up to 30 history steps with Ctrl+Z / Ctrl+Y. You can also press Escape to reset the current page to zero crop.
No. Processing happens 100% in your browser using pdf-lib and pdfjs-dist. Your file never leaves your device.
Yes. Auto-crop whitespace detection works on scanned documents. It detects both white and colored backgrounds and finds the content boundary automatically.
Yes. Full touch support for the crop rectangle. Drag handles and move the crop area on iOS and Android browsers.
WhiskFile is free, browser-based, no sign-in required. Auto-crop whitespace, extend margins mode, aspect ratio lock, page size presets, odd/even mode, undo/redo, keyboard shortcuts — Adobe's online crop requires sign-in and Pro subscription for advanced features.
Yes. Crop PDF on WhiskFile is completely free with no account required. Free users get 7 tasks per day with files up to 50 MB. There are no watermarks on any plan. Pro plans ($4.99/month) unlock unlimited tasks, 500 MB files, batch processing, and API access.
Yes. Crop PDF runs entirely in your browser using WebAssembly. Your files are never uploaded to any server — they stay on your device throughout the entire process. No data is transmitted, stored, or accessible to WhiskFile or any third party.
Crop PDF accepts PDF files as input and produces PDF output. The maximum file size is 50 MB on the free plan (500 MB for Pro users). There are no page count limits.
See how WhiskFile compares to other PDF tools on features, pricing, and privacy.
Chromebook & Linux
Any modern browser
