Are my files uploaded to a server?

No. This conversion runs inside your browser using your own device’s processing power, and the file is not uploaded. Once a tool has been used once (video, text recognition and background removal download their engine from this site the first time), it keeps working 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.

Change the page size of a PDF

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.

How much the content changes size

Scale to fit uses one factor for both directions, as large as the new page allows. Letter onto A4 shrinks the content to about 97% and leaves about 13 mm of white at the top and at the bottom. A4 onto Letter shrinks it to about 94%, with about 9 mm at each side. A5 onto A4 enlarges it to about 141%, and A4 onto A5 reduces it to about 71%. Text and vector drawings stay sharp at any factor; photographs and scanned pages are enlarged without gaining detail, so a scan enlarged a lot prints softer.

Centre without scaling keeps the content at its size. Letter onto A4 then loses about 3 mm at the left and right edges and gains about 9 mm of white at the top and bottom; A4 onto Letter loses about 9 mm at the top and at the bottom. The cut strips are hidden, not deleted. In both modes, bookmarks and links that jump to a spot on a page are moved with its content, so they still land in the same place.

Orientation and custom sizes

Follow each page decides page by page: a page wider than it is tall goes onto a landscape sheet, the others onto portrait sheets. A page that is shown turned through a rotation setting is judged by how it looks, and it keeps that setting.

A custom size follows the same rule: portrait pages get it upright, landscape pages get it turned, unless you choose Portrait or Landscape to force one. Width and height must each be between 10 and 5000 mm.

Reading the current sizes

When the file loads, the tool lists the page sizes it contains and how many pages have each. A size within about 1 mm of a standard one is given its name, such as A4 or Letter, with an arrow (⟷) when the page lies in landscape; any other size is given in millimetres. A document put together from several sources may list a few sizes; after resizing, every page has exactly the size you chose.

Any trim and bleed boxes meant for professional printing are removed, because they would no longer match the new page. The new file is named after the original with the size added, for example report-a4.pdf.

Frequently asked questions

Are my files uploaded to a server?: No. This conversion runs inside your browser using your own device’s processing power, and the file is not uploaded. Once a tool has been used once (video, text recognition and background removal download their engine from this site the first time), it keeps working 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.