We Make PDFFree, Private Document ToolsOpen tools
DOCUMENT DIFF & AUDIT TOOL

Compare PDF documents
spot every difference.

Compare two versions of a contract, agreement, or report in seconds. Pinpoint text edits, design revisions, and deleted content with visual color diffs, wipe sliders, and side-by-side analysis with 100% privacy.

  1. 1 Upload Two PDFs
  2. 2 Review Differences
  3. 3 Download Report
DOCUMENT A (ORIGINAL)

Select Original PDF

Drag & drop original file or browse

VS
DOCUMENT B (REVISED)

Select Revised PDF

Drag & drop updated file or browse

100% private in-browser comparison. Documents never leave your device.

Processed locally on your device. Zero document uploads.
  • Visual Color Diff OverlayAdded content appears in green, removed content in red, and unchanged text in muted gray.
  • Interactive Wipe SliderDrag a split divider across the page to inspect before and after revisions in real time.
  • Side-by-Side ReviewView Document A and Document B synchronized side-by-side with matched page navigation.
  • 100% In-Browser PrivacyDiffing is performed in your device memory with WebAssembly. No files are uploaded to any server.

Pro Tip: Use the Swap button between Document A and B to quickly reverse the comparison direction.

HOW IT WORKS

Three Steps to Compare Any Two PDF Documents

Audit contracts, legal briefs, technical specifications, and academic papers with complete accuracy.

01

Upload Both PDF Documents

Select or drag-and-drop the Original PDF (File A) and the Revised PDF (File B) into the dual upload zone.

02

Review Differences Visually

Switch between Color Overlay Diff, Interactive Wipe Slider, and Side-by-Side views to pinpoint edits and revisions instantly.

03

Download Comparison Report

Export a comprehensive visual diff PDF report with highlighted modifications directly to your computer.

100% Private Client-Side Processing

Your documents never leave your browser

Unlike cloud comparison tools, We Make PDF executes all rendering and pixel-level comparison directly on your machine. Your confidential contracts, NDAs, and proposals remain strictly on your computer.

FREQUENTLY ASKED QUESTIONS

Frequently Asked Questions

Everything you need to know about comparing PDF documents in your browser.

How does the visual PDF comparison detect changes?

We Make PDF renders both PDF pages at high resolution and computes a pixel-by-pixel difference analysis. Content removed from Document A is highlighted in crimson red, while newly added content in Document B is highlighted in emerald green.

Can I compare two PDFs with different page counts?

Yes! If Document B has extra pages or fewer pages, We Make PDF compares matching page numbers and flags added or deleted pages so you never miss a change.

What is the Wipe Slider comparison view?

The Wipe Slider provides an interactive split-screen divider that you can drag left and right across the document to see a seamless "before and after" transition of any page.

Are my confidential contracts or financial PDFs uploaded to a server?

Never. All rendering, image alignment, and diff computations run 100% locally on your computer or smartphone using WebAssembly. Your files remain completely private in browser memory.

Can I export a PDF report showing the detected differences?

Yes! You can click "Download Comparison PDF Report" to download a multi-page PDF document containing color-highlighted diffs for each page.