Catches more than spelling
Beyond typos, it flags subject-verb agreement, tense shifts, run-on sentences, misused punctuation, and awkward phrasing that spellcheck alone misses.
Free Grammar Checker
Free Grammar Checker Online
Catch spelling mistakes, grammar errors, and awkward phrasing before anyone else sees them — free, with no word limits or sign-up walls.
Explains every fix
Each correction comes with a short reason, so you actually learn the rule instead of just accepting a silent replacement.
Keeps your voice
Fixes errors without flattening your tone into generic corporate English — casual writing stays casual, formal stays formal.
Where people use it
- Emails and Slack messages before you hit send
- Essays, cover letters, and college applications
- Blog posts and social media captions
- Resumes and LinkedIn summaries
- Reports and business documents
How the grammar checker works
Paste or type your text, and the checker scans it for spelling, grammar, and punctuation issues in seconds. Each flagged issue shows the suggested fix and a plain-English reason, so you can accept it, edit it, or leave it as-is. It's part of SuperPrompts' free toolbox, alongside a Paraphraser, Summarizer, Translator, and AI Humanizer.
Try It FreeFrequently asked questions
Is SuperPrompts' grammar checker free?
Yes. The grammar checker is free to use, with no word limit or sign-up wall required to check your text.
What does a grammar checker actually catch?
It catches spelling mistakes, subject-verb agreement errors, tense shifts, run-on sentences, misused punctuation, and awkward phrasing — not just typos.
Does it change my writing style?
No. It fixes grammatical errors without flattening your tone into generic corporate English — casual writing stays casual, formal stays formal.
Can I use it for essays and cover letters?
Yes. It's commonly used for essays, cover letters, resumes, emails, reports, and any other writing where clean grammar matters.