LanguageTool

Key facts: LanguageTool checks grammar, spelling, punctuation and style in more than 30 languages, with browser extensions, a web editor and add-ins for Word, Google Docs and LibreOffice. It also offers paraphrasing, a personal dictionary and style guides, and it is open source at its core.

Plans: LanguageTool has a free plan with basic checks and a character limit per check, and a Premium plan that adds thousands of extra checks, longer texts, unlimited paraphrasing and the Word add-in. Check the official pricing page for current limits.

Best for: multilingual writers and teams writing across languages. Watch out: no checker replaces a native speaker for nuance — use it to catch errors, then read the text aloud before publishing.

Pros

• Checks grammar, spelling, punctuation and style in more than 30 languages.
• Available as browser extensions, a web editor and add-ins for Word, Google Docs and LibreOffice.
• Also offers paraphrasing, a personal dictionary and style guides.
• Open source at its core, with a long track record as a writing checker.

Watch out for

• No checker replaces a native speaker for nuance: use it to catch errors, then read the text aloud before publishing.
• The free plan has basic checks and a character limit per check.
• Premium is needed for thousands of extra checks, longer texts, unlimited paraphrasing and the Word add-in.

Best for

Multilingual writers and teams writing across languages. Who should skip it: writers working in a single language who are happy with their editor's built-in checker.

Pricing

A free plan with basic checks and a character limit per check, and a Premium plan that adds thousands of extra checks, longer texts, unlimited paraphrasing and the Word add-in. Check the official pricing page for current limits.

FAQs

How many languages does it cover? More than 30 languages for grammar, spelling, punctuation and style checks.

Where can I use it? In the browser via extensions and a web editor, and in Word, Google Docs and LibreOffice via add-ins.

What does Premium add? Thousands of extra checks, longer texts, unlimited paraphrasing and the Word add-in.

Can it replace a human editor? No. It catches errors well, but nuance still needs a native speaker's read-through.