Diffnote
Browser-based document diff tool with no server uploads
Details
- External ID
- 46885679
- Source
- HN
- Company
- —
- Product
- Diffnote
- Website domain
- diffnote.net
- Launched
- Feb. 4, 2026
- Cohort
- —
- Upvotes
- 5
- Upvotes percentile
- 0.10512129380053908
- Tags
- —
- Fetched at
- Sept. 7, 2026, 9:26 p.m.
- Updated at
- Sept. 7, 2026, 9:26 p.m.
Description
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...
Enrichment
- Theme
- document and PDF utility tools
- Vertical
- Horizontal
- Function
- Dev tools
- Audience
- Developer
- AI stance
- Not AI
- Project type
- Commercial product
- Normalized one-liner
- document diff tool for developers
- Manually corrected
- False
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 — 272 launches clear the similarity bar, closest 8 shown.
Attention rank: #265 of 273 (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
- PDF Tools Base · ph · 2026-09-21 · 1 upvotes · similarity 0.48
- PDFly · hn · 2026-07-24 · 10 upvotes · similarity 0.47
- Diffswarm · hn · 2026-01-06 · 8 upvotes · similarity 0.46
- Word in Web · hn · 2026-07-21 · 37 upvotes · similarity 0.46
- AmiPDF · ph · 2026-09-23 · 1 upvotes · similarity 0.44
- Docx to PDF in the Browser Using Pandoc and Typst (WASM) · hn · 2026-02-09 · 6 upvotes · similarity 0.44
- DiffFind · ph · 2026-09-27 · 2 upvotes · similarity 0.44
Other launches for this product
- No other launches for this product.
Same idea, different domain
Nobody's really built a dev tools tool for Sales yet.