PDF Studio

Compare PDF

Find the text differences between two PDFs. Free, private and processed in your browser — files are never uploaded.

How to use Compare PDF in 4 steps

  1. Upload the original PDF first, then the changed version.
  2. Click "Compare PDF".
  3. Every added and removed line is found automatically.
  4. Download the colour-coded comparison report.

When to use Compare PDF

Verifying that a signed contract matches the draft, checking that a revised report has only the expected changes, or auditing document version history.

Key features

  • Line-by-line Diff — Every differing line is shown with red removed and green added highlighting.
  • Page Count Comparison — Instantly flags if the documents have different numbers of pages.
  • File Facts Side by Side — Page count, file size and number of text lines for both files.
  • Smart Line Matching — Inserted or removed lines are detected without flagging everything after them as changed.
  • PDF Report Output — Results are delivered as a downloadable PDF you can keep as a record.

Frequently asked questions

What does the report show?

A summary (pages, size, number of changes) and every removed line in red and added line in green, with the page it is on.

Does the order of files matter?

Yes. The first file is treated as the original (A) and the second as the new version (B).

Can I compare scanned PDFs?

Run both through OCR PDF first so they have text to compare.

Can I compare a Word file with a PDF?

Convert the Word file with Word to PDF first, then compare the two PDFs.

Works well with