Runs on your device · Your file never leaves your device.
A Letter-size file that needs to print on A4, a scan whose pages are all slightly different sizes, an A5 booklet that should be A4 for submission: pick the new page size and every page is put on it. Choose whether the content is scaled to fit — proportions kept — or centred at its original size.
Nothing is re-rendered. The page box is changed and the existing content is moved and scaled inside it, so text stays selectable, fonts stay embedded, and links, comments and form fields move with the content. The file stays about the same size.
Mixed documents are handled page by page: each page is fitted on its own, and “Follow each page” keeps landscape pages landscape while portrait pages stay portrait. Force one orientation if the printer needs it.
How to Change the page size of a PDF
Add the PDF — the current page sizes are listed.
Pick the new size (or type a custom width and height in mm), the orientation, and fit or centre.
Press Resize pages and download the file.
Supported formats and limits
Input
PDF (any version)
Sizes
A4, Letter, Legal, A3, A5, B5, Tabloid, custom mm
Modes
Scale to fit (proportions kept) or centre without scaling
Orientation
Follow each page, or force portrait / landscape
Quality
Lossless — content is transformed, not re-rendered; text and links kept
Where it runs
In your browser; nothing uploaded
Not for: Reflowing text to a new page size — the page is scaled as a whole, so lines do not re-wrap; convert to Word for that.
Frequently asked questions
Are my files uploaded to a server?
No. This conversion runs entirely inside your browser using your own device’s processing power. The file never leaves your computer or phone, which is why it also works when your connection drops.
Scale to fit or centre without scaling?
Scale to fit is right almost always: the page is enlarged or reduced so it fills the new size with proportions kept. Centre without scaling keeps the content at exactly its printed size — useful for labels and forms with fixed dimensions — and anything larger than the new page is cut off at the edges.
Will the page look stretched?
No. Scaling is uniform, so a Letter page on A4 gets a little white space at the top and bottom rather than being squashed.
Does it work for a PDF where every page is a different size?
Yes — that is the main use. Each page is fitted on its own to the size you choose, so the result is uniform whatever came in.