TextWarden

6.9easy start · #47of 88
in Grammar checkers

Well documentedyes
Runs where you workno

Runs on Browser, Mac.

TextWarden is ranked #47 of 88 in grammar checkers on The Geeks Club. It runs on Browser extension, macOS. There is a free plan.

TextWarden plans and pricing

All plans

TextWarden Free macOS 14 Sonoma or later · English grammar checking · no account or subscription github.com · 11 Oct 2026

Compared on grammar checkers

Free plan: Yes
Browser extension: Yes
Desktop app: Yes
Mobile app: No
Style suggestions: Yes
Tone detection: No

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The record

What it does: TextWarden checks English spelling, grammar, punctuation, and style while you type across macOS apps.
Local grammar engine: Grammar checking runs locally using the bundled Harper grammar checker.
Writing suggestions: It offers real-time suggestions, one-click corrections, and a Fix All command for clear-cut errors.
English dialects: Users can choose American, British, Canadian, Australian, or Indian English.
Language detection: Optional local language detection can suppress English checks for passages confidently identified as one of 69 selected non-English languages; it does not translate or proofread them.
Apple Intelligence: On macOS 26 or later, a compatible Apple M-series Mac can use Apple Intelligence for style suggestions, rewrites, and composition; these features are off by default.
Integrations: The maker lists support for apps including Slack, Claude, ChatGPT, Perplexity, Apple Mail, Notion, Microsoft Word, Outlook, Teams, and supported browsers.
Privacy: The maker says writing, prompts, corrections, settings, and usage statistics stay on the Mac, and that TextWarden has no cloud grammar service, telemetry, or analytics.
Updates and signing: The configuration guide says release updates use an HTTPS appcast, EdDSA update signatures, Apple code signing, and notarized builds.
Requirements: TextWarden requires macOS 14 Sonoma or later, an Intel or Apple Silicon Mac, and Accessibility permission to read and update text in other apps.
Notable limits: Grammar checking is English-only, and the maker says some editors may not expose enough information for accurate underlines or safe corrections.
Support: The maker invites users to report bugs or request features and ask questions through the project’s GitHub issue and discussion links.
Project status: The maker describes TextWarden as an actively developed side project.
Price from: Free

Where it ranks on The Geeks Club

Best Grammar Checkers in 2026#47 of 88

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Sources

github.com/PhilipSchmid/textwarden· checked 11 Oct 2026
github.com/PhilipSchmid/textwarden/blob/main/CONFI· checked 11 Oct 2026