Resize PDF
Choose a standard paper size or enter custom dimensions, then resize your PDF's pages and download the result — free, private, and processed entirely in your browser.
About the PDF Page Resizer
Our free online PDF page resizer lets you change the physical page dimensions of any PDF document. Format a document for printing, adjust an odd-sized page to a standard A4 or US Letter size before submitting it, or apply a custom size to match a specific layout requirement.
Unlike most online tools, resizing happens entirely inside your browser using the pdf-lib library — your document is never uploaded to a server. That means it's fast, works without an internet round-trip, and keeps your files completely private and secure.
How to Resize PDF Pages
Step 1
Upload your PDF file
Drag and drop a PDF document, or choose one from your device.
Step 2
Choose a target size
Pick A4, US Letter, US Legal, or A3, or switch to Custom and enter your own width and height.
Step 3
Resize and download
Click "Resize PDF" and download your formatted document instantly.
Frequently Asked Questions
What are the standard dimensions for A4 and Letter?
A4 is 210 × 297 mm (595.28 × 841.89 pt), the standard paper size used across most of the world. US Letter is 8.5 × 11 inches (612 × 792 pt), the standard size used in the United States and Canada.
Does resizing pages delete any content?
No. Resizing changes the physical page canvas boundary stored in the PDF's metadata — the text and content on the page remain exactly as they were, at their original position and scale.
Is my data safe?
Yes. Resizing happens entirely in your browser using the pdf-lib library — your PDF is never uploaded to a server, so it stays completely private.
Can I resize just some pages instead of the whole document?
Yes. Choose "Specific pages / range" and enter the page numbers or ranges you want to resize, like 1, 3-5. All other pages will keep their original dimensions.
Does it cost money?
No. The PDF resizer is 100% free to use, with no registration or account required.