Launched this week
Diffnote

Diffnote

Compare documents privately

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Free online document comparison tool. Compare TXT, PDF, DOCX files with IDE-style diff viewer. All processing happens in your browser - your files are never uploaded to any server. No signup required.
Diffnote gallery image
Diffnote gallery image
Diffnote gallery image
Diffnote gallery image
Free
Launch tags:Productivity•Privacy•Developer Tools
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Flowstep
Flowstep
Generate real UI in seconds
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What do you think? …

이재한
Maker
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Hi everyone! I built Diffnote because I was frustrated with existing document comparison tools — most require file uploads to servers, signups, or paid subscriptions for basic features. As someone who often compares contracts and documents, I wanted something that: - Works instantly without registration - Never uploads files to any server (100% client-side processing) - Supports multiple formats (TXT, PDF, DOCX, JSON, Markdown) - Has a clean IDE-style diff viewer Everything runs in your browser using JavaScript, so your documents never leave your device. Built with Next.js and deployed on Vercel. I'd love to hear your feedback — what features would make this more useful for you?