Unify PDF Page Sizes
DocumentsEverything runs locally in your browser — nothing is uploaded
Drop files here, or click to choose
PDF · up to 100 MB per file
Solves the two things print shops and submission systems reject most: inconsistent paper (a scan mixing A4 and Letter, where one printer setting guillotines half of it) and content running to the edge (trimmed off at binding). Two approaches: scale to a paper size — the whole page is scaled proportionally and centred with a margin; and add margins — the content keeps its size while the page grows around it. Three deliberate choices: proportional scaling only, never stretched (forcing A4 into Letter squashes the letters and it is visible in print); landscape pages get landscape paper (otherwise a landscape A4 in portrait paper is scaled down to a thin strip); and sizes that were already uniform are reported as such, so you are not left wondering whether it worked.
Features
- Unify to A4, A3, A5, B5, Letter or Legal
- Landscape pages get landscape paper — never squeezed into a strip
- Proportional scaling, centred — never stretched
- A "margins only" mode: content unchanged, the page grows around it (for binding and annotation)
- Margins from 0 to 50 mm
- Reports the before-and-after size, including when nothing changed
- Nothing is uploaded and no server is involved
How to use
- Drop a PDF in
- Choose the target paper (or "margins only")
- Set a margin if you want one
- Download the result
FAQ
- Does scaling make the text blurry?
- No. Text and vector art in a PDF are instructions ("write these glyphs at this size at this coordinate"), and scaling multiplies those instructions by a factor — the text is re-rendered at the target size and stays sharp, unlike scaling an image. The real risk is scaling *down* too far: A3 into A5 makes the type too small to read, which calls for splitting across pages rather than shrinking.
- Should I scale, or add margins?
- It depends on the problem. Inconsistent paper (A4 mixed with Letter) calls for scaling: unify it and the printer is configured once. Content at the edge (binding will cut into text) calls for margins: the content keeps its size, the page grows, and the binding edge has room. You can do both — pick a target paper *and* a margin, which gives "A4 with a 10 mm border all round".
- Why do print shops insist on A4?
- Because their machines are loaded with a paper size and configured for its margins and duplex flipping. A file mixing A4 and Letter will have pages shaved by a few millimetres when the machine runs A4 (Letter is 6 mm wider and 18 mm shorter than A4). Unifying to A4 means they do not need special settings for your file — which is the difference between accepted and sent back. Submission systems are often just as strict, since they impose a fixed layout.
- Is the file uploaded?
- No. Resizing changes page parameters and content transformation matrices in the browser, with no network requests, and it works offline.
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