Diffnote
Browser-based document diff tool with no server uploads
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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 VercelNo files ever leave the browser. No signup required. Site: https://diffnote.net Product Hunt: https://www.producthunt.com/products/diffnote?launch=diffnot...
HN · launched Feb 4, 2026 · 5 upvotes (top 89%) · 1 view
Niche: browser-based utility tools · 670 launches, 61 in the last 7 days ▼ -10% · Explore this niche →
Category and tags
- Horizontal
- Workflow automation
- B2C
- Not AI
- Commercial product
Visit website ↗ Source listing ↗
More like this: all 670 launches in browser-based utility tools →
Could you build this?
Yes Diffnote is a client-side document comparison web app utilizing standard browser JavaScript libraries (e.g., pdf.js, mammoth.js, diff-match-patch) to parse files and render diffs.
Discussion
No comments on this launch.
Competitors
Other products that read as similar to this one : 715 launches clear the similarity bar, closest 8 shown.
Attention rank: #706 of 716 (itself plus its competitors, highest first, normalized so YC and Product Hunt are compared fairly).
Launched 96 days after the earliest competitor.
- Text Compare · ph · 2026-09-11 · 2 upvotes · similarity 0.62
- Doc Diff · ph · 2026-10-23 · 3 upvotes · similarity 0.57
- Word by Word Diff Checker · ph · 2026-11-07 · 1 upvotes · similarity 0.55
- TextCompareLab · ph · 2026-10-21 · 2 upvotes · similarity 0.53
- PDF Compare · ph · 2026-10-17 · 2 upvotes · similarity 0.52
- PDF Tools Base · ph · 2026-09-21 · 1 upvotes · similarity 0.48
- localipdf · ph · 2026-11-03 · 1 upvotes · similarity 0.47
- Diffswarm · hn · 2026-01-06 · 8 upvotes · similarity 0.47
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