TextChecker review
A free browser extension for users who want to choose their own AI provider.
Reviewed by iTechGuides Editors · Editorial team · Updated Sep 2026
TextChecker is a free, open-source browser extension for checking spelling, grammar, punctuation, and writing style. It is designed for people who want AI-assisted writing checks while choosing between Google Gemini, OpenAI, and Anthropic Claude. The extension provides real-time checking, on-demand checks through a keyboard shortcut, inline correction suggestions, a personal dictionary, and writing statistics tracking. Builds are available for Chrome-based browsers and Firefox, while the product is positioned as a browser-focused tool rather than a broader writing application.
The provider choice is a central part of TextChecker. Users can configure Google Gemini, OpenAI, or Anthropic API keys and select the provider used during checks. The extension stores those keys locally, and text is sent directly to the selected AI provider when checking takes place. This approach gives open-source users control over the AI service behind the writing workflow, but it also means the product itself does not cover provider usage charges. Anyone choosing TextChecker should account for the separate API-key requirement and possible provider costs.
Its feature set focuses on everyday browser-based writing assistance rather than a wide platform ecosystem. Real-time checking, keyboard-triggered checks, inline suggestions, style checking, dictionary support, and writing statistics cover the main editing workflow without adding unrelated tools. TextChecker is a good fit for users who value open source, want to choose their AI provider, and primarily write in a supported browser. Users who need a broader platform scope or prefer a service that supplies the AI access itself should choose an alternative.
TextChecker pros and cons
- Where it wins
- Real-time and on-demand grammar, spelling, punctuation, and style checks
- Supports Google Gemini, OpenAI, and Anthropic Claude
- Stores user-provided API keys locally and includes a personal dictionary
- Where it doesn't
- Users must provide their own AI-provider API keys
- Text is sent to the selected AI provider during checks
- Its browser-extension scope limits platform breadth
TextChecker fact sheet, pricing and score →
Advertiser disclosure: iTechGuides is reader-supported. Vendors can pay for top positions in our rankings and for a place on other products' pages, and we may earn a commission when you click some links. Bought places stand at the number bought; this page and our disclosure say so. Paying vendors may get a fuller, more detailed review from our editors, and that review can change their score. How we rank.
Last updated · How we research and update