What Crop PDF does
PDFGrover's Crop PDF tool trims the visible area of every page to a single rectangle you draw on the page preview. Use it to strip white scanner margins, focus on one figure, remove print bleed/crop marks, or narrow a page for a different paper size.
How cropping works
PDFs store content at full page dimensions plus a set of "boxes" that control what the viewer renders. Cropping here updates the CropBox for every page so the viewer only shows your chosen rectangle. Nothing is re-rendered or re-encoded.
This has two consequences:
- File size stays about the same — no content is removed, just the visible window is narrower.
- The crop is reversible — someone opening your PDF in a capable editor can expand the crop box and see what was trimmed. For actually-gone-from-the-file redaction, use Redact PDF.
Limitations
- Same crop on every page — this tool applies one rectangle to every page uniformly. Per-page crops would require opening each page individually, which isn't in this tool's scope.
- Crop uses the first page as a reference — if your document has mixed page sizes (e.g. a landscape figure in the middle of portrait text), the crop rectangle may fall outside some pages' visible area. Check a few mid-document pages after cropping.
Common use cases
- Trimming scanned book margins — strip the white border around pages from a book scan so the text fills the page
- Removing print bleed marks — engineering or design PDFs exported with crop marks for offset printing
- Focusing on a single figure — keep only the diagram or chart from a 2-column technical document
- Narrowing page width for printing on a different paper size without re-flowing text
- Cropping headers/footers that show internal classifications, draft watermarks, or page numbers that aren't useful for the recipient
When NOT to use Crop
- For sensitive data removal — cropping only hides content from the default rendering. The full page is still in the file and can be recovered by anyone with a PDF editor. For true redaction of confidential text or images, use Redact PDF.
- When pages have varied dimensions — the crop rectangle is chosen on the first page and applied to every page using the same absolute coordinates. If the document has both portrait letter pages and a landscape figure, the crop may fall outside some pages' visible area.
- For per-page selection — Crop is uniform across the whole document. For different crops per page, use Edit PDF to manually adjust each page.
Tips
- The crop rectangle is set on the first-page preview. The thumbnails on the left show how the crop will land on each page — scan through them before saving to catch mixed-size pages.
- File size of the output is almost identical to the input because no content is re-encoded; the change is purely metadata.
- The crop is reversible by reopening the PDF in any editor that exposes the CropBox property — useful if a recipient needs the trimmed margins back.
Troubleshooting
- Crop landed wrong on some pages — the rectangle uses the first page as reference; mixed-size documents may need a check of mid-document pages, or per-page work in Edit PDF.
- Need the margins back — re-open in any editor that exposes the crop box; nothing was deleted.
- Sensitive content still recoverable — that's expected; use Redact PDF for true removal.
Privacy and file handling
Crop PDF runs entirely in your browser. No upload, no server involvement, nothing retained — the cropped file exists only in your tab until you download it. No sign-up, no watermark.