Resize PDF Pages

What this tool does

Resize PDF Pages converts every page, or a chosen range, to a new paper size. See the current page sizes, pick a standard or custom size and orientation, then scale the content to fit or keep it at its original size on the new page, with an optional margin.

Documents move between regions that use different paper. US Letter (215.9 × 279.4 mm) is slightly wider and shorter than A4 (210 × 297 mm), so a Letter PDF printed on A4 gets odd margins or clipped edges, and print shops, journals and government portals often insist on one specific size. Scanned files are worse, with every page a slightly different size.

This tool first lists the page sizes found in your PDF, then redraws each selected page onto a new page of the size you choose. Scale to fit enlarges or shrinks the content by the same factor in both directions so nothing is distorted; Keep 100% places the content at its original size in the centre of the new page. Content is embedded with pdf-lib as vectors, so text stays sharp, and the work happens in your browser.

How to use Resize PDF Pages

1. Drop a PDF onto the upload area and look at the Current page sizes table.
2. Choose the Paper size, or Custom size and enter width and height in millimetres.
3. Set Orientation: Match each page keeps landscape pages landscape, or force portrait or landscape.
4. Choose Scale to fit or Keep 100%. With scaling, Only shrink stops small pages from being enlarged.
5. Optionally add a Margin and limit Pages to a range.
6. Press Resize pages and download the result.

Tips for better results

• Letter to A4 with Scale to fit shrinks content by about 2.3 percent, which is barely noticeable; the extra height becomes white space.
• A margin of 5 mm with Scale to fit prevents content from reaching the unprintable edge of office printers.
• Use Only shrink when normalising a scan with mixed page sizes, so small receipts are not blown up to full-page size.
• The Standard column in the size table recognises common sizes within 2 mm, which helps identify pages that were scanned at the wrong size.

Common use cases

• Converting US Letter documents to A4 for printing in Europe, Asia or Australia, or the reverse.
• Normalising a scanned bundle where every page has a slightly different size.
• Preparing a manuscript at the exact page size required by a printer or publisher.
• Scaling A3 drawings down to A4 for a quick reference copy.

Common mistakes to avoid

• Using Keep 100% when going to a smaller page, which cuts off content at the edges.
• Expecting links, comments and form fields to survive. Resized pages are redrawn, and interactive elements are not kept.
• Enlarging a low-resolution scan to a big size; the images become more visibly pixelated.