Korr
Free offline grammar checker for 5 languages, no account
Details
- External ID
- 1250192
- Source
- PH
- Company
- —
- Product
- Korr
- Website domain
- producthunt.com
- Launched
- Sept. 15, 2026
- Cohort
- —
- Upvotes
- 1
- Upvotes percentile
- 0.30815693820825313
- Tags
- Chrome Extensions, Writing, Security
- Fetched at
- Sept. 16, 2026, 1:16 a.m.
- Updated at
- Sept. 16, 2026, 1:16 a.m.
Description
Korr fixes French, English, Spanish, Italian and Portuguese right where you write: no account, no limit, no connection needed. Everything runs on your device. There is no analysis server, and you can check it: cut your connection after the first load and it keeps working. Every change is listed and can be rejected one by one. When a fix is uncertain, Korr changes nothing. Website and Chrome extension (Alt+Shift+C) for all five languages; Windows app (Ctrl+Alt+C) for French and English.
Enrichment
- Theme
- ai translation and localization tools
- Vertical
- Horizontal
- Function
- Content generation
- Audience
- Prosumer
- AI stance
- AI feature
- Project type
- Hobby / open-source project
- Normalized one-liner
- offline multilingual grammar checker for writers
- Manually corrected
- False
Could you build this?
Partial A basic UI wrapper is simple, but compiling and running an accurate offline, multi-language grammar checker in-browser/on-device requires specialized WASM compilation and model quantization.
What it would actually take: The architecture requires compiling an established NLP engine (such as LanguageTool or quantized small transformer models) to WebAssembly via Rust or C++, running inside a Web Worker. The critical difficulty is maintaining low memory usage (<150MB) and fast keystroke latency across five languages while packaging large rule/dictionary databases directly into client-side bundles. This requires expertise in WebAssembly performance tuning, client-side memory management, and computational linguistics.
Competitors
Other products that read as similar to this one — 33 launches clear the similarity bar, closest 8 shown.
Attention rank: #19 of 34 (itself plus its competitors, highest first — normalized so YC and Product Hunt are compared fairly).
Launched 272 days after the earliest competitor.
- LingoGeek · ph · 2026-09-08 · 1 upvotes · similarity 0.37
- LingoLint · ph · 2026-09-16 · 2 upvotes · similarity 0.37
- Krisp Accent Converter for YouTube · ph · 2026-04-13 · 419 upvotes · similarity 0.35
- Veyra — Translate Youtube Videos · ph · 2026-09-28 · 1 upvotes · similarity 0.35
- Basedash in Español Français & Português · ph · 2026-09-09 · 108 upvotes · similarity 0.35
- offline-voice-typing · github · 2026-09-13 · 7 upvotes · similarity 0.34
- Skriptor · ph · 2026-09-14 · 1 upvotes · similarity 0.34
- Le petit verbeux · ph · 2026-09-30 · 1 upvotes · similarity 0.34
Other launches for this product
- No other launches for this product.
Same idea, different domain
Nobody's really built a content generation tool for Government yet.