Korr
Korr: Korr offers private, local correction with useful browser and Windows coverage. Ranked #21 of 88 in Grammar Checkers by our editors (6.6/10); pricing: Free plan; best for free offline multilingual correction.
At a glance
- Editor score6.6 / 10
- PricingFree plan
- Best forFree offline multilingual correction
- Free planYes
- Paid fromFree
- Facts checked21 Sep 2026
Where it wins
- Local correction works without an account, usage limits or an analysis server.
- Supports French, English, Spanish, Italian and Portuguese.
- Personal dictionaries, review controls and optional local rewriting styles.
Where it doesn't
- Platform support focuses on web, Windows and Chrome-compatible browsers.
- Language coverage is limited to five languages.
- Feature depth centers on correction rather than broader writing workflows.
Our verdict on Korr
Korr is a free offline grammar checker for people who want local correction in French, English, Spanish, Italian or Portuguese. Its correction engines run locally on the device, without an account, usage limits or an analysis server. Users can review changes individually with accept or reject controls, maintain a personal dictionary stored locally, and choose between the web app, Windows application or Chrome-compatible browser extension. The tool covers grammar, spelling, punctuation, typography and selected language-specific corrections.
Its platform fit is practical for browser-based writing and Windows workflows. The browser extension works in text fields on websites, while the Windows app can correct selected text in other programs. Listed integrations include Microsoft Word, Microsoft Outlook, Discord, Gmail and Slack. The web app can also be installed for offline use, giving users more than one way to keep correction local across common writing environments.
Korr’s strongest distinction is its no-cost offline model. Optional local AI rewriting styles extend the product beyond correction while keeping processing local, according to the product description. The trade-off is a narrower scope: language coverage is limited to five languages, and the experience is centered on correction, review and selected rewriting styles rather than a wider writing platform. Choose Korr if local processing, multilingual correction and a free plan matter most. Choose an alternative if you need broader language coverage or deeper writing-workflow features.
Your product? Our editors can test Korr in depth and publish a review, labelled as paid · from $149/mo →
Korr pricing
Korr fact sheet
| Free plan | Yes |
|---|---|
| Paid from | Free |
| Browser extension | Yes |
| Desktop app | Yes |
| Mobile app | Not verified |
| Style suggestions | Yes |
| Tone detection | Not verified |
| Languages supported | 5 |
| Deployment | Desktop, Browser extension |
| Platforms | Web, Windows, Chrome extension |
| Support | |
| Built for | Solo, Small business (editorial estimate) |
| Integrations | 5 integrations: Microsoft Word, Microsoft Outlook, Discord, Gmail, Slack |
| Pricing | Free plan |
| Website | korr.peekrapp.com |
| Facts checked | 21 Sep 2026 |
Korr integrations
Korr lists 5 integrations on its own site.
- Microsoft Word
- Microsoft Outlook
- Discord
- Gmail
- Slack
Alternatives to Korr
- GrammarlyA broad writing assistant with strong grammar, tone, rewriting, and AI coverage.9.4
- LanguageToolA broad multilingual checker with open-source and self-hosting options.9.2
- Microsoft EditorA strong Microsoft 365 writing assistant with focused platform coverage.9.0
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Featured on iTechGuides
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Reviewed by iTechGuides Editors · Editorial team · Updated Oct 2026
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