Diffnote – Browser-based document diff tool with no server uploads
I built a web-based document comparison tool where all file parsing and diffing happens entirely in the browser. The idea came from watching non-technical coworkers struggle to compare document versions — manually reading two files side by side or fighting with Word's Track Changes. Technical details: PDF parsing via pdf.js, DOCX via mammoth.js — all client-side Diff engine: Google's diff-match-patch Line, word, and character-level comparison Next.js 15 + TypeScript, deployed on Vercel No files ever leave the browser. No signup required. Site: https://diffnote.net Product Hunt:…
Diffnote – Browser-based document diff tool with no server uploads launched on February 4, 2026 with 5 votes, #1,883 of 16,628 launches that month and more than 75% of that year's launches.
What it does
Compare documents online for free. Supports TXT, PDF, DOCX, JSON, Markdown. Privacy-first: files never leave your device. No signup required. IDE-style diff viewer with side-by-side and unified views.
All processing happens locally in your browser. Your files never leave yourfrom diffnote.net
In the maker’s words, at launch
I built a web-based document comparison tool where all file parsing and diffing happens entirely in the browser. The idea came from watching non-technical coworkers struggle to compare document versions — manually reading two files side by side or fighting with Word's Track Changes. Technical details: PDF parsing via…
Does a similar job
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PDF-Diff - Visualize any differences between two PDFs2022 · github.com · ▲169A tool for visualizing differences between two pdf files. - serhack/pdf-diff
Diffchecker 2.02020 · diffchecker.com · ▲153Check the differences between two text files, images or PDFs
Secure private diffchecker with merge supportNov 2025 · diffchecker.dev · ▲17This brand new secure diffchecker. It's supports text/code diff upto 25k lines with character level diff all in browser. Supports one of the best inhouse diff merge feature. https://diffchecker.dev/ Now, add list diff - to compare two lists and show unique, common and diff between two lists. https://diffchecker.dev/list/ Add json diff, supports semantic json difference. https://diffchecker.dev/json/ With consistent, clean, minimal UI elements. Would you switch from other websites. Please checkout and provide feedback.
- ANA new way to diff websites2015 · diffd.com · ▲46
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