Crop & resize pages
Crop margins or set pages to A4 / Letter / custom size.
Runs in this tab. The file stays here.
About Crop & resize pages
Crop PDF page margins or set page boxes to A4, Letter, or Legal — offline with pdf-lib.
Scans often have huge white borders. Print jobs need Letter when the source is A4. This tool either crops a uniform margin in inches or sets the page size to a standard preset.
Crop trims margins from each page. Resize-to-preset changes the page media box to A4 / Letter / Legal — it does not magically reflow text to fit. Content that sat near the edge can clip; check a page before you send the file.
For changing which pages exist, use Organize. For making the file smaller in bytes, use Compress.
How to use Crop & resize pages
- 1Drop a PDF.
- 2Choose Crop margins (inches) or Resize to A4 / Letter / Legal.
- 3Download and spot-check the edges.
What it won't do
- No interactive drag-crop rectangle per page.
- Resize presets do not reflow layout.
Common questions
Does resize scale my content to fit the new paper size?
No. It sets the page box. Content is not reflowed or uniformly scaled to “fit to page” like a printer dialog.
Can I set a custom width and height?
Not in the current UI. Presets cover the common paper sizes. Crop handles margin cleanup.
Is crop destructive to content under the margin?
Cropped regions are outside the new box. Treat it like a trim — do not crop into text you still need.
Related tools
Why this one doesn't upload your file
There is no server to upload to. This page is a static file, and the work happens in your browser using the same graphics and WebAssembly code that renders every other site you visit. Your file is read from disk into memory, processed, and handed back as a download. Once the page has loaded you can disconnect from the network entirely and it keeps working. The longer explanation