PDF Compare
Shows two PDFs page by page with a third panel marking pixel differences in red.
Artifact by Simon Willison
IndexedApache-2.0Documents & PDFNo sign-up
Use it
Opens tools.simonwillison.net in a new tab. Nothing to install.
- You provide
- Two PDF files
- You get
- Visual diff
- Account
- No sign-up needed
- AI
- No AI: a plain tool
- Your input
- Not stated: check the tool's privacy notes before using private data
- Price
- Free to use
- Made with
- AI-built app
- Source
- Open source
- Link check
- Answered on Nov 1, 2026
About
PDF Compare is an AI-built single-page app in the documents pdf category (pdf diff). It opens in your browser, so there is nothing to install. You provide two PDF files and get visual diff. It needs no account. It is a plain tool: no AI model is involved. The source code is public on GitHub (simonw/tools).
Category: Documents & PDF · pdf diff
Reviews
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Details
- Auth
- No auth
- License
- Apache-2.0
- Repository
- github.com/simonw/tools
- First seen
- Oct 31, 2026
- Last checked
- Nov 1, 2026
- Source
- GitHub
More from Simon Willison
Cite this page
PDF Compare: free online tool. Agent Mart. https://agentmart.dev/artifacts/pdf-compare (last updated 2026-11-01)