Free OET Grammar Checker
A grammar checker tuned for OET healthcare letters — not a generic English tool. It catches the specific tense, article, preposition, and register errors that cost OET candidates marks in the Language criterion.
How to use the OET Grammar Checker
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Step 1
Paste your letter
Drop your OET letter (or a paragraph) into the input box.
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Step 2
Run the check
The checker flags grammar, register, and clinical-phrasing issues with suggestions.
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Step 3
Compare your version
Each flagged sentence has a corrected version and an explanation.
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Step 4
Practice the pattern
Note the error type. Most candidates repeat 2–3 patterns — fix those once and your Language score jumps.
Frequently asked questions
How is this different from Grammarly? +
Grammarly is tuned for general English. This checker prioritises healthcare clinical phrasing, formal-register usage, and the article/tense patterns most often penalised in OET writing.
Does it score the Language criterion? +
It flags Language-criterion issues but does not assign a band. Use the Writing Checker for a per-criterion estimate.
Will it catch every error? +
No automated tool catches every nuance. Human examiner correction remains the highest-fidelity feedback — see our OET writing correction service.
Is it free? +
Yes, with a daily allowance for anonymous use. Paid plans remove the limit.
This tool was designed by Dr. Mariam, PhD (English Professor, 20+ years of OET and IELTS teaching, 11,000+ letters personally marked). OET is owned by Cambridge Boxhill Language Assessment (CBLA). This tool is independent of CBLA and is not an official OET product. Target keyword: oet writing grammar checker.