TextChecker

Extension

Freedom report

Two barsScore 6.9

TextChecker is ranked #40 of 88 in grammar checkers on Freedom251. It runs on Browser extension. There is a free plan.

TextChecker plans and pricing

Free Free Free, open-source browser extension; users provide their own AI API keys and pay for API usage github.com · 12 Oct 2026

Purpose: TextChecker is a free, open-source alternative to the LanguageTool browser extension for AI-powered grammar, spelling, and style checking.
AI providers: It supports Google Gemini, OpenAI GPT, and Anthropic Claude using the user's own API keys.
Checks: It checks spelling, grammar, punctuation, and style.
Checking modes: Users can enable configurable real-time checking or run checks on demand with Ctrl/Cmd + Shift + G.
Suggestions: It underlines errors and offers click-to-fix popovers, plus a personal dictionary for words to ignore.
Writing statistics: The extension tracks writing improvements with statistics.
Languages: It supports English, German, Spanish, French, Portuguese, and other auto-detected languages.
Integrations: Release v1.0.2 adds support for Google Docs.
Browsers: The maker provides extension builds and installation instructions for Chrome, Edge, Brave, Arc, and Firefox.
Privacy: The README says API keys are stored in Chrome sync storage, text is sent to the chosen AI provider only when checking, and the project uses no analytics or tracking.
Data flow: The maker says API keys are sent only to the selected AI provider and text is sent there when grammar is checked.
License: The project is released under the MIT License and invites contributions via pull request.
Release: The GitHub releases page lists TextChecker v1.0.2, released February 2.
Price from: Free

Claim it for free: prove the domain, then correct facts, plans and screenshots. An editor reviews every change.