Compare PDF Documents
Visually inspect two PDF documents side-by-side with highlighted differences.
Removed Text (From Original)
Added / Modified Text (In Modified)
How to use Compare PDF
- All processing happens locally in your browser — your private documents never leave your device.
- Green overlays indicate content added or modified in the new file.
- Red overlays show content that was removed from the original document.
- Ensure both PDF documents share a similar orientation for the best visual comparison alignment.
- Check the summary text panel to quickly identify precise text changes page by page.
Common Uses
Quick ideas to get the most out of Compare PDF
- Legal contracts — Spot modified clauses, added conditions, or removed terms between contract drafts.
- Document revisions — Verify editorial changes, typo fixes, and structural updates between document versions.
- Financial statements — Double-check numerical changes, pricing updates, or line-item adjustments across reports.
- Design & layout — Detect visual shifts, font modifications, alignment differences, or image swaps.
- Academic papers — Track revisions, peer-review edits, and bibliography changes prior to final submission.
- Policy updates — Audit corporate handbooks or compliance guidelines for unexpected policy alterations.
- Permits & applications — Compare official filings to ensure no critical data points were shifted or omitted.
- Batch verification — Cross-examine standardized documentation templates against generated output copies.
Your sensitive files never leave your device. All comparison processes run entirely inside your browser.
Inspect original and modified document pages side-by-side with clear visual overlays for changes.
Review a structured text panel listing exact added or removed snippets page by page.
See a clear message when a page has no text differences — so you know when documents match.
Flip through pages using top or bottom controls effortlessly to audit large documents fast.
No accounts, hidden subscriptions, or limits. Compare your PDF documents instantly and completely free.
Frequently Asked Questions (FAQ)
Everything you need to know about comparing PDF documents
1. How does comparing two PDF documents work?
The tool shows both PDFs side-by-side, extracts text page by page, and highlights differences on the canvas and in a text summary panel.
2. What do the colored overlays mean on the side-by-side view?
Green: text added or changed in the modified file.
Red: text that was in the original and is no longer in the modified file.
3. Are my private documents uploaded to any server or stored online?
No. Comparison runs 100% in your browser. Your files never leave your device.
4. What if the two documents are identical?
If a page has no text differences, you will see a clear message such as “Identical page” and a banner confirming there are no changes on that page.
5. How do I navigate through long multi-page documents?
Use Previous Page and Next Page above and below the comparison grid to move through pages without extra scrolling.
6. What should I do if the side-by-side pages don’t align properly?
Best results come when both PDFs share a similar page size and orientation. Small font or layout differences can shift visual alignment slightly.
7. How does the Text Differences summary panel work?
It lists added and removed text snippets for the current page, next to the visual comparison.
8. Does this tool work on mobile devices and tablets?
Yes. It works on modern mobile browsers on Android and iOS. For long documents, a desktop layout is usually more comfortable.
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