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Compare PDFs

Compare two PDFs page by page, highlight text differences and get a similarity score.

3 free files a day · No sign-up · No ads

Frequently asked questions

How do I use Compare PDFs online?

Upload your PDF file, adjust the options if you need to and press Run. PDFMaster processes the file on our servers and gives you the HTML result to download in seconds, with no software to install.

Is Compare PDFs free?

Yes. You can use Compare PDFs online for free with 3 files a day, renewed daily, with no account and no ads. Premium removes the daily limit.

Is my document safe?

Files travel over HTTPS and are kept only for the time needed to finish the job. Nothing is shared with third parties and you can delete the output as soon as you have downloaded it.

Guide and use cases

Compare PDFs: Guide and use cases

Compare two PDF files and see exactly which text was added, removed or changed. Get a clear side-by-side difference report without reading both versions line by line.

How it works

  1. Upload the original PDF and the revised version.
  2. Click Compare.
  3. Review the report of added and removed text per page.
  4. Download the comparison result.

Use cases

Tips