Resize PDF Pages Online
Resize PDF pages to A4, Letter, Legal, A3, A5, or B5. Optionally scale content to fit. Processing stays in your browser.
No PDF selected.
No PDF loaded yet
Target page size
Choosing "Scale to fit" proportionally scales page content to fit the new size. "Keep original size" changes the page dimensions only.
Resized PDF is ready
File size: -
Resize PDF pages to standard formats
Change all pages in your PDF to A4, Letter, Legal, A3, A5, or B5. Optionally scale the content to fit the new dimensions, or keep the original size and change only the page boundaries. Processing stays in your browser.
Common uses
- Convert Letter PDFs to A4 for international submission.
- Resize A3 posters to A4 for printing on a standard office printer.
- Standardize mixed-size PDFs into one consistent page size.
Before sending a resized PDF, open the result and check margins, signatures, tables, QR codes, and page numbers. Changing the page box can affect how a printer centers content, while scaling can make small text harder to read. For official submissions, use the paper size requested by the recipient, then keep the original file as a backup.
If the file mixes portrait and landscape pages, review both orientations after resizing. A quick print preview can reveal clipped edges before the PDF reaches a client, school, court, or government portal. This also helps catch pages that were originally scanned off-center.
Privacy
Your PDF stays in your browser. Resizing happens locally with pdf-lib.
Related
Frequently asked questions
Will scaling distort my content?
Scaling is proportional (same ratio for width and height), so content keeps its aspect ratio. There may be empty space on one axis if the source and target aspect ratios differ.
Which page size should I choose?
A4 is standard in most countries. Letter is standard in the US and Canada. Legal is used for legal documents in the US. Choose the format your recipient expects.
Are my documents uploaded?
No. Resizing runs locally in your browser with pdf-lib.