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PDF Tools

Compare PDF Page Sizes

Compare two PDFs page by page and find where the dimensions differ.

or drag them here

application/pdf, .pdf · up to 100 MB · up to 2 files

Processed in your browser

Fill in the form and press “Compare” to see the result here.

How to use it

  1. 1Select your PDF, or drag and drop it onto the upload area.
  2. 2Adjust the options if you need something other than the defaults.
  3. 3Press the button. The document is processed on your device - nothing is uploaded.
  4. 4Download the result. Your original file is untouched.

About the Compare PDF Page Sizes

Useful when a document has been through a conversion and you need to confirm the page geometry survived - a silent A4 to Letter conversion shifts every margin.

Questions people ask

Is my PDF uploaded to a server?

No. The document is read and rewritten by JavaScript in your own browser. Nothing is transmitted, which is the only sensible arrangement for contracts, invoices, medical records and anything else people put in a PDF.

Is your document uploaded to a server?

No. This tool runs entirely in your browser using standard web APIs, so your document never leaves your device. You can confirm it by opening your browser's network panel while the tool runs, or by disconnecting from the internet after the page has loaded.

Is it free, and do I need an account?

Yes, it is free, and there is no account, no sign-up and no watermark on the result. The project is funded by optional donations.