Upload your PDF
Upload your PDF with the upload box. The tool reads it and shows the current page sizes.
PDF TOOLS · FREE ONLINE TOOL
PDF Page Size Changer
Resize every page of a PDF to A4, Letter or a custom sizeChange the page size of a PDF free: convert A4 to Letter, Letter to A4 or any custom size, with content fitted to the new page. No upload, no sign-up.
// PDF PAGE SIZE CHANGER · GET STARTED
Use PDF Page Size Changer
Resize every page of a PDF to A4, Letter or a custom size
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Choose a PDF file
Your PDF is resized in your browser. It is never uploaded.
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How to use the PDF Page Size Changer
Pick the new page size
Choose a preset such as A4 or Letter, or enter a custom width and height.
Resize the pages
Keep fit mode on for documents, then click resize and wait for the new file to be built.
Download the result
Download the resized PDF and check the reported page size matches what you chose.
// PDF PAGE SIZE CHANGER · ABOUT THIS TOOL
About the PDF Page Size Changer
Page size mismatches are a quiet, common printing problem: a report created on A4 arrives at a US office that only stocks Letter, a book interior is built at the wrong trim size, a form designed on Letter has to be filed in an A4 country. This PDF page size changer fixes the document itself, not just the print settings, by rewriting every page to the new size with the content scaled and centred to fit.
The tool works the way a careful designer would: in fit mode your content is scaled proportionally, never cropped and never stretched, so a converted document looks intentional rather than squeezed. An exact-size mode is included for the rare systems that demand edge-to-edge pages. Custom sizes accept millimetres, inches or PDF points, and the tool reports the size it found and the size it produced so you can verify the result before sending it anywhere.
Everything runs locally in your browser, which keeps private documents private and makes the tool fast even on large files. It sits alongside the other PDF tools here, splitting, merging and compressing, so a complete print-ready workflow never needs your file to leave your machine.
PDF Page Size Changer FAQs
Upload the PDF, choose Letter (or A4) from the preset list, keep the fit mode on, and download the result. The fit mode scales each page proportionally and centres it on the new page size, so an A4 document becomes a true Letter document with slightly wider margins instead of a cropped or stretched one. This is the conversion printers in the US ask for when a document was created on A4, and the same in reverse for European printing.
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