How to Compare Two PDF Versions
Published September 4, 2026 · 3 min read
Tracking down what actually changed between a contract's first draft and its final version — or two revisions of a report — is tedious to do by eye. This tool extracts the selectable text from both PDFs and shows you a line-by-line diff of what was added, removed, or changed.
Try Compare PDFSteps
- 1
Open the Compare PDF tool
Go to the PDF comparer.
- 2
Upload both PDF versions
Add the original and the revised document.
- 3
Run the comparison
The tool extracts text from both and lines up matching content.
- 4
Review the differences
Added, removed and changed lines are clearly marked so you can scan for what's new.
Frequently asked questions
It compares the selectable text content of each PDF, not pixel-level layout — ideal for spotting wording changes, not moved images or formatting tweaks.
Only if the scanned PDF has a text layer already (for example, from OCR). A pure image-only scan has no text to extract and compare — run OCR PDF first if needed.
Run the tool once per pair of versions you want to compare — it's designed for clear, focused two-way comparisons.
Because both documents are read entirely in your browser, you can compare confidential contract drafts without either version ever leaving your device.