Free PDF Tool · Pages

PDF Page Size Converter

Run pdf page size converter in your browser. Free, private, no signup — your selected files are processed in your browser and are not uploaded to our server.

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Drop your file here

or click to browse from your device

Accepts: .PDF

About this PDF Page Size Converter

Change the page size of your PDF with our pdf page size converter tool. Pick a standard size — A4, Letter, Legal, A3, A5, or a custom size — and resize all pages by default, or enter a page range to resize selected pages.

The operation is browser-side using pdf-lib. You can scale content to fit, stretch it to fill, or crop it into the selected page size.

Your privacy is the default. Your selected files are processed in your browser and are not uploaded to our server; all processing happens client-side using browser PDF libraries such as pdf-lib and PDF.js where needed. Closing the tab clears the working session from this page; downloaded files remain on your device.

This tool is free to use with no signup required. Large files may be limited by your browser’s memory and device performance. Part of PDF Tools Base, a privacy-first collection of 161 PDF utilities. Bookmark the page for next time, and explore related tools in the footer below.

How to use the PDF Page Size Converter tool

  1. Drop your PDF.
  2. Select the target page size.
  3. Click Process and download.

Why use PDF Tools Base?

100% Browser-Based

PDF Page Size Converter processes selected files in your browser. Your selected files are processed in your browser and are not uploaded to our server.

No Server Upload, No Signup

Your selected files are processed locally in your browser. No account, no server upload, no email needed.

No Watermark Ever

Outputs are clean. We never stamp our brand or a paywall watermark on your files.

Free to Use

No accounts and no signup. Use the tool as much as you need within reasonable browser limits.

Works on Every Device

Windows, Mac, Linux, iPhone, iPad, Android, Chromebook. Any modern browser.

Built on Open Source

Powered by browser-side open-source PDF libraries such as pdf-lib and PDF.js, depending on the operation.

Common uses for pdf page size converter

Standardise to A4

Many printers and submission portals require A4.

Match your printer

Output Letter or Legal-size before printing.

E-reader fit

A5 reads more comfortably on small e-readers.

Frequently asked questions

Is PDF Page Size Converter safe to use?

Yes. Everything happens in your browser. Your selected files are processed in your browser and are not uploaded to our server. Closing the tab clears the working session from this page; downloaded outputs remain on your device until you delete them.

Do I need to register or sign in?

No. No account, no email, no sign-up. Open the page and start using the tool immediately. Free to use, no signup needed.

Is there a watermark on the output?

No. PDF Tools Base never adds a watermark or branding to your output. Your final file is clean — just what you produced from the original.

Is there a file size limit?

There is no fixed limit. Files are processed in your browser, so RAM, page count, and file complexity affect what is feasible. Phones may struggle with large PDFs; try splitting first or use a desktop browser.

Does this work on mobile devices?

Yes. The tool works on all modern mobile browsers: Chrome on Android, Safari on iOS, Firefox, Edge, Brave. The drag-and-drop also accepts files from your phone’s file manager.