Put every page of a PDF onto the same standard sheet — A4, Letter, Legal, A3, A5 or Tabloid — scaling the content to fit. Free in your browser — no sign-up, no watermarks.
How to change a PDF’s page size
- Click Choose files (or drag & drop) and select one or more PDF files. You can also paste them from your file manager.
- Pick the paper size and orientation, then how the existing content should be fitted to it — scaled to the new size, or placed at its original size and centred.
- Press Change the page size. Processing runs with a live progress indicator.
- Open the download page to save your files individually or grab everything as a single ZIP.
Why change a PDF’s page size?
US Letter and A4 are close enough to look interchangeable and different enough to ruin a print job: Letter is wider and shorter, so an American document sent to a European printer loses a strip off one side or arrives shrunk with an unexplained margin. The other common case is a document assembled from several sources, where the pages are three different sizes and no printer tray is happy. This redraws each page onto the sheet you choose, scaled to fit and centred, so the whole document is one consistent size.
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About the formats
Two standards, four millimetres, one ruined print job
US Letter is 216 by 279 millimetres. A4 is 210 by 297. They are similar enough that a document looks fine on screen and different enough that printing one on the other never quite works: Letter is wider, so the edges get clipped, and it is shorter, so there is a gap at the bottom. Most printer drivers respond by silently shrinking everything to about 94% and adding a margin nobody asked for, which is why a perfectly ordinary contract comes back looking subtly wrong.
The other case is a document that was assembled rather than written: a scanned cover, a report exported from one program, an appendix from another. The pages are three sizes at once. Some viewers hide this and every printer notices.
The pages are redrawn, not rasterised
Each page is placed onto the new sheet as a real, scaled page. Text stays selectable and searchable, lines stay lines, and the result is as sharp printed at A3 as it was at A5. Nothing is turned into pixels along the way.
Following the page, or overruling it
A document is rarely all one orientation. A report with two landscape tables in the middle should keep those tables landscape, which is what following each page does: the sheet turns to match. Forcing portrait or landscape is for when the source is inconsistent by accident rather than on purpose — a scan where a few pages came out sideways, say — and you want one uniform stack at the end.
Fitting, and the one option that loses something
Fitting the whole page on the sheet is the safe default: everything that was on the page is still on the page, and because the proportions of Letter and A4 differ slightly, a thin margin appears on two edges. Filling the sheet removes that margin by scaling until the sheet is covered — which means the overhang falls off the edges. On a full-bleed photo book that is exactly right. On anything with text near the margin it will cut into it, so fit unless you have a reason.
Frequently asked questions
Is this Change PDF Page Size tool free?
Yes — completely free, with no sign-up, no watermarks and no daily quota. Processing happens in this browser, so the practical limit is the memory available on your device.
Can I process multiple PDF files at once?
Yes. Add as many files as you like — each one is processed in sequence with its own progress status, and you can download the results individually or all together as a ZIP archive.
Does editing re-compress my PDF or reduce its quality?
No. Pages are copied at the object level — text, fonts, images and vector content are carried over as-is, without re-rendering. The output keeps the same sharpness and searchable text as the original.
Does the text stay sharp after resizing?
Yes. Each page is placed as a real, scaled page rather than a picture of one, so text stays selectable and searchable and lines stay crisp at any resolution. Choosing to fill the sheet instead of fitting the page is the one option that loses anything: it crops whatever falls outside the new edges.
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