Harper
A free, open-source grammar checker that runs entirely on your device.
Browser ExtensionFreeChrome, Firefox
4.5Visit
Browser Extension
LanguageTool
A grammar, spelling and style checker for more than 30 languages, with a free plan.
Built with love by Shushant Lakhyani. Building bestproductivityresources.com
What is LanguageTool?
LanguageTool checks grammar, spelling, punctuation and style as you write, in more than 30 languages. It works in Chrome, Edge, Firefox and Opera, in Google Docs, Word, Apple Pages and LibreOffice, in email apps such as Gmail and Apple Mail, and as apps for macOS, Windows and iOS. The free plan checks shorter texts and includes a few AI rephrasings a day; Premium raises the length limit and adds unlimited rephrasing.
Pros
- Checks more than 30 languages, not just English
- Works in browsers, Google Docs, Word and email apps
- Useful free plan with no time limit
Cons
- Free plan limits how much text it checks at once
- AI rephrasing is capped on the free plan
Who should use LanguageTool
Anyone who writes in more than one language and wants grammar checks everywhere.
Who may not need it
People who only need a quick spell check in one app.
LanguageTool alternatives
Similar resources to LanguageTool, picked from the directory.
Grammarly
Writing help that follows you into every app and inbox.
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Kit
Email marketing for creators, free for up to 10,000 subscribers.
Web AppFree planWeb, iOS
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Hemingway Editor
A free web editor that highlights long, hard-to-read sentences so your writing gets clearer.
Web AppFree planWeb, macOS
4.4Visit
Wordtune
AI rewrites that suggest clearer, shorter or more formal versions of your sentences.
AI ToolFree planChrome, Web
4.3Visit
ProWritingAid
A grammar checker and style editor built for long-form writers, with a free plan.
Web AppFree planWeb, macOS
4.4Visit
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