How to resize PDF pages with OnyxPDF
- Drop your PDF into the tool.
- Choose the target: A4, Letter, A5, Legal — or a scale percentage.
- Click “Resize & Save”.
- Download the resized PDF.
Why do it in your browser instead of uploading?
- Fix the classic A4-vs-Letter mismatch before printing, without re-creating the document.
- Content is scaled to fit and centred — never stretched or clipped.
- No upload and no paywall (Smallpdf charges for its resize in Pro).
- Percentage mode is perfect for slightly-too-big scans and handouts.
Good to know (honest limits)
- Resizing scales the whole page — including margins. A page with huge margins stays margin-heavy at the new size; crop first if that is the problem.
- Text stays text (pages are embedded, not re-rendered), but extreme scaling can make small print tiny.
Frequently asked questions
Does resizing distort my pages?
No. Pages are scaled proportionally to fit the new size and centred, so circles stay circles.
What is the difference between A4 and Letter?
A4 is 210×297 mm (most of the world); US Letter is 216×279 mm — slightly wider and shorter. Converting avoids clipped edges when printing across regions.
Can I make pages bigger, not just smaller?
Yes — choose a larger target size or a scale above 100%.
Are files uploaded?
No. The new pages are built in your browser and downloaded directly.