Check grammar, spelling, punctuation, and style instantly. See every issue highlighted with one-click fix suggestions — paste and it checks automatically.
Powered by LanguageTool · 20+ languages supported
AI Fix corrects tense, agreement, articles & plurals in one pass
Paste your text — it auto-checks after a moment, or click Check Grammar.
Catch grammar and spelling errors before submitting coursework or dissertations.
Polish professional emails and business documents for a clear, confident tone.
Proofread articles and blog content without paying for expensive grammar tools.
Detailed explanations for each issue help you learn as you correct.
Grammar mistakes reduce trust. Whether it is a misplaced comma, a subject-verb disagreement, or a misused homophone, errors in professional writing undermine credibility instantly. Credify's free online grammar checker uses the LanguageTool engine — the same open-source technology used by Automattic and Mozilla — to catch errors that basic spellcheckers miss. It works across more than 20 languages, including English, Spanish, French, German, and Portuguese, with no word limits and no account required.
Every flagged issue comes with a plain-English explanation and a one-click fix suggestion. Unlike subscription grammar tools, there are no daily caps and no paywalled features. Paste up to 20,000 characters — a full blog post or chapter — and get results in seconds. The detailed rule explanations alongside each correction make it especially useful for non-native English writers who want to understand the grammar rule, not just accept the fix. After correcting errors, use the clarity checker to eliminate filler words and passive voice, the readability checker to verify your Flesch score, and the paraphrasing tool to reword any awkward passages.
Grammarly uses a proprietary model and charges for advanced features. Credify's grammar checker is powered by the open-source LanguageTool engine, is completely free, and has no word or usage limits.
Grammar (subject-verb agreement, tense consistency), spelling, punctuation (comma splices, apostrophes), style issues (wordiness, redundancy), and common homophone confusions such as their/there/they're and it's/its.
Yes — it supports 20+ languages including Spanish, French, German, Portuguese, Dutch, Polish, and Russian. The language is detected automatically from your text.
No. Text is sent to our API for grammar checking and is not stored after the response is returned. There is no logging of input content.