Resize PDF
Runs in your browserPut every page of a PDF onto the same paper size, in your browser. Nothing is uploaded. Pages are scaled to fit and centred, which is what fixes a document that prints half size or refuses to print at all.
or drop them here, or paste
One file. It stays on your device.
Each page is placed onto a new page of the size you chose, scaled to fit inside the margin and centred. Nothing is cropped and the proportions are kept, so a page never comes out stretched.
Everything happens inside this page. Your file is read by JavaScript running on your own machine, and no part of it is sent anywhere.
The A4 and Letter problem
A4 is 210 by 297 millimetres. Letter is 216 by 279. Letter is wider and shorter, and the difference is enough that a printer given the wrong one either scales the job down with a white band along an edge, or reports a paper mismatch and stops.
That is the single most common reason to reach for this tool: a document made in one country being printed in another. Converting the pages properly beats relying on whatever the print driver decides to do.
Documents with mixed page sizes
A PDF assembled from several sources often has pages of different sizes in it, and it can look fine on screen while being a nuisance on paper: the printer re-scales each page separately and the text ends up a different size on different sheets.
Resizing everything to one size fixes that. The scale factor differs per page, but the paper does not, so the document prints as one job.
Margin
The margin is empty space left around the content on the new page, in points. 72 points is an inch.
Some margin is worth keeping even when the original had none, because most printers have an unprintable strip a few millimetres wide around the edge. Content pushed right to the boundary gets clipped, and the missing part is usually a page number.
Scaling up is limited by the original
Going from A5 to A3 makes the page larger and everything on it larger with it. Text scales cleanly because fonts are drawn from outlines rather than stored as pixels.
Images do not. A photograph placed at 150 dpi on an A5 page is at roughly 75 dpi once that page is A3, and it will look soft. Nothing here can add detail that was never captured.
How to resize pdf
- 01
Add your PDF
Select or drop the file.
- 02
Choose a paper size
A4, Letter, A5 or A3, and a margin.
- 03
Resize
Press Resize pages and download the new document.
Questions about Resize PDF
How do I change a PDF from Letter to A4?
Add the file, choose A4, and press Resize pages. Every page is scaled to fit A4 and centred, with the proportions kept.
Why does my PDF print smaller than it should?
Usually because the page size does not match the paper, so the printer scales the job to fit. Resizing the document to the paper you are using removes the guesswork.
Will resizing stretch my pages?
No. Pages are scaled proportionally and centred, so a page never comes out distorted. What changes is the empty space around it.
Does making pages bigger improve the quality?
Text stays sharp because fonts are drawn from outlines. Images do not: enlarging a page spreads the same pixels over a larger area, so photographs look softer.