PDF Page Size Converter
Runs entirely in your browser
Convert every page of a PDF to A4, A3, A5, Letter, Legal or a custom size. Your file is processed entirely in your browser and is never uploaded to our servers.
Drag & drop a PDF file here
or
Up to 50MB, up to 300 pages.
File
What is PDF Page Size Converter?
PDF Page Size Converter changes the paper size of every page in a PDF — for example turning a document sized for A4 into Letter, or into a custom size of your choosing. Each page's original content is scaled proportionally and centered on the new page, so nothing gets stretched or distorted.
How to use PDF Page Size Converter
- Choose a PDF file, or drag and drop it into the tool.
- Pick a target page size — A4, A3, A5, Letter, Legal, Original or Custom.
- Choose an orientation, or leave it on Auto to match each page.
- Click Convert PDF and download the result.
Features
- Convert to A4, A3, A5, Letter, Legal or a custom size in millimeters.
- Force Portrait or Landscape, or match each page's own orientation automatically.
- Scales and centers content proportionally — no stretching or distortion.
- 100% client-side — your PDF never leaves your browser.
Frequently Asked Questions
Is my PDF uploaded to a server?
No. PDF Page Size Converter resizes your file entirely in your browser. It is never uploaded to our servers.
Will my content be stretched or distorted?
No. Each page's content is scaled proportionally to fit the new page size and centered, so its original aspect ratio is preserved. If the new page has a different shape, you'll see some empty margin rather than distorted content.
Does changing orientation rotate my content?
No. Choosing Portrait or Landscape changes the shape of the new page, but the content itself keeps its original orientation and is scaled to fit inside that page.
Can I set a custom page size?
Yes. Choose Custom and enter a width and height in millimeters.
Is there a page limit?
You can convert PDFs up to 50MB. Only the first 300 pages are converted for very long documents.