Resize PDF Pages

Resizing a PDF sets every page to a new physical size — A4, US Letter, US Legal, A3, A5, or a custom width and height you type in millimetres, inches, or points. Each page's content is scaled to fit the new dimensions with its proportions preserved, then centred, so nothing is stretched or squashed; if the target shape differs from the original you'll simply see an even margin rather than any distortion. It's the reliable way to standardise a mixed-size document to A4 before printing, or to fit an oversized page onto a smaller sheet.

You can resize a single PDF or up to 30 at once with the same settings — one file downloads as a PDF, several as a ZIP. Everything is redrawn locally in your browser with pdf-lib, so your file is never uploaded and never leaves your device. Note that this changes the page dimensions, not the file size in megabytes: if your goal is a smaller file to email or upload, use Compress PDF instead.