Add or adjust margins on all PDF pages
Last updated: 2026-10-08
PDF Margin Editor is a free online tool that adds or adjusts the margins on every page of a PDF, effectively repositioning existing content within a new page boundary. It's used to create space for binding holes, printer-safe margins, annotations, or to standardize margin width across a document assembled from multiple sources with inconsistent layouts. Margin adjustment happens entirely client-side using pdf-lib, so the file is never uploaded to a server. There is no file-size limit and no cap on the number of pages processed in one operation. The tool preserves original page content and formatting, only repositioning it within the adjusted margin boundaries. No account, login, or software installation is required, and it works identically across desktop and mobile browsers, producing a downloadable PDF with updated margins applied uniformly to every page within seconds of setting the desired margin values.
Yes, all 32 tools are 100% free forever. No hidden charges, no premium version, no login required.
No. We have zero file size restrictions. Process any PDF of any size, as many times as you want.
Absolutely. All processing happens locally in your browser. Your files never get uploaded to any server. 100% private.
Never. No account, no email, no registration. Just open the tool and start using it instantly.
Yes. PDF Master Pro works on all devices — desktop, tablet, and mobile — in any modern browser.