PDF Compare
Compare two PDFs page by page without uploading them.
About PDF Compare
What is the PDF Compare Tool?
PDF Compare helps you review two versions of a document side by side. It renders each page locally, compares the visual output, and highlights differences so you can spot changed text, moved elements, missing images, spacing shifts, or layout problems.
How to compare two PDFs
- Drop PDF A and PDF B into the tool.
- Pick a render scale and tolerance level.
- Review each page with a highlighted diff preview.
Best uses
- Proofing: Check final PDFs before sending them to clients or printers.
- QA: Compare exports after a template, design, or data change.
- Contracts: Quickly see visible changes between draft versions.
- Privacy: Review sensitive files without uploading them.
Good to know
This is a visual PDF comparison. It is great for visible changes, but it is not a legal redline tool and does not verify cryptographic signatures.
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What does PDF Compare check?
It compares the visual rendering of each page and highlights page-level differences.
Does it compare text content?
The comparison is visual, so it catches visible layout, text, image, and spacing changes.
Are my PDFs uploaded?
No. Both PDFs are rendered and compared locally in your browser.
What does tolerance mean?
Tolerance controls how sensitive the diff is. Increase it to ignore tiny rendering differences.
Can it compare PDFs with different page counts?
Yes, but pages that do not have a matching counterpart will be flagged as different.
For adjacent PDF review and editing tasks, see PDF Merger.
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