What is the Crop PDF?
Cropping a PDF trims away the margins around the content — the white borders, scanner edges and dead space that make pages look amateurish. It matters whenever a PDF will be read on a small screen, printed as a booklet, or presented to an audience: cropped pages look bigger, cleaner and more professional, and the content fills the visible area instead of swimming in whitespace.
This tool crops by adjusting each page's crop box — the official PDF mechanism that defines the visible region. You enter margin percentages for the top, right, bottom and left edges, and the tool shows you the exact crop rectangle in points before you commit, including what percentage of the page is kept. Cropping is non-destructive to the underlying content: the trimmed regions are simply hidden from view, and the original data stays in the file.
You can crop every page at once or target a page range like 2–5 or 1,3,7. That matters for real documents — a scanned book might need heavy cropping on content pages but none on the cover, and a slide deck exported from PowerPoint often has uniform margins you can trim in one pass. The live numeric preview updates as you type, so there is no guesswork about how aggressive your crop is.
Because everything runs in your browser, cropping is instant and private. There is no upload queue, no watermark added to your pages, and no account to create. Whether you are tidying a scanned textbook, removing black scanner borders from receipts, or tightening a pitch deck before sending it to investors, the cropped file downloads in seconds and opens in any PDF reader.
It helps to understand what cropping actually changes. Every PDF page carries several boundary boxes, and the crop box is the one that defines the visible region — viewers show only what falls inside it. This tool edits that box rather than deleting content, which is why cropping is instant and lossless: no pixels are re-encoded, no text is altered, and the file size barely moves. It also means cropping is reversible in a full-featured PDF editor if you ever need the margins back. If you instead want to physically remove content or shrink the file, use a redaction or compression tool after cropping — each tool in the PDF suite does one job well, and combining them gives professional results. Practical cropping advice: work from the outside in. Start with a modest 5% on all sides and check the preview numbers, then increase only the edges that still show unwanted borders. Scanned documents often need more trimming on the leading edge where the scanner lid casts a shadow, and less on the inner margin. And always check the first and last pages of a batch before processing hundreds of pages — covers and back pages frequently have different margins than the body, and a few seconds of checking saves a re-run.
How to use it
- Drop your PDF onto the tool — Drag and drop or click to choose the file. It is processed locally — nothing is uploaded.
- Enter margin percentages — Type how much to trim from the top, right, bottom and left edges (0–49% each).
- Choose the pages — Leave 'all' to crop every page, or target a range like 2-5 or specific pages like 1,3,7.
- Check the live preview — The tool shows the exact crop rectangle in points and the percentage of the page kept, updating as you type.
- Crop and download — Click Crop PDF to apply the crop box to the selected pages and download the trimmed file.
Common use cases
- Removing white scanner borders from scanned books and documents
- Tightening slide decks so content fills the screen when presented
- Trimming oversized margins from academic papers before printing
- Cleaning up receipts and invoices scanned with dark edges
- Preparing PDFs for e-readers where margins waste screen space
Tips
- Start with small values like 5–8% and increase gradually — over-cropping cuts off content
- Use the live crop-rect preview to confirm the numbers before applying
- Crop specific page ranges when covers or title pages need different margins
- Remember cropping hides rather than deletes content — the file size stays roughly the same
- For scanned books, check odd and even pages separately since scanner margins often differ
- Combine with the compress tool afterwards if you also need a smaller file
Frequently asked questions
How do I crop a PDF online for free?
Drop your PDF on the tool, enter margin percentages for each edge, optionally pick a page range, and click Crop PDF. The trimmed file downloads immediately — no signup, no upload to a server.
Does cropping a PDF delete the trimmed content?
No. Cropping adjusts the page's crop box, which hides the trimmed regions from view. The original content remains in the file, so cropping is reversible in a full PDF editor.
Can I crop only some pages of a PDF?
Yes — enter a page range like 2-5 or a list like 1,3,7 in the pages field instead of 'all', and only those pages are cropped.
Why do my scanned PDFs have black edges?
Flatbed scanners capture the area around the page, including the scanner lid. Cropping 5–15% from each edge removes these borders cleanly.
Can I crop a PDF without uploading it?
Yes — cropping happens entirely in your browser; your file is never sent to a server.
Does cropping a PDF reduce its quality?
No. Cropping only trims the visible margins — the remaining content keeps full quality.
Can I crop a PDF without uploading it?
Yes — cropping happens entirely in your browser; your file is never sent to a server.
Does cropping a PDF reduce its quality?
No. Cropping only trims the visible margins — the remaining content keeps full quality.