Grammar Checker
Check text for common grammar and spelling mistakes
How to Use Grammar Checker
- Open Grammar Checker above — it loads instantly, no signup or download required.
- Provide your input (paste text, drop a file, or type directly into the tool).
- Get your result instantly — everything is processed locally in your browser and nothing is uploaded.
- Copy or download the output. Refresh the page to clear all data from memory.
About Grammar Checker
What this page solves
Grammarly and its clones send every word you type to a remote server, keep it for model training, and gate the most useful checks behind a $30/month subscription. This checker flags the common grammar, punctuation, and style issues locally, with zero uploads.
Grammar Checker scans your text for the common grammar, punctuation, spelling-in-context, and style problems that trip up email drafts, essays, and blog posts — subject-verb disagreement, double negatives, misplaced apostrophes, comma splices, passive-voice overuse, wordy phrasing, weak modifiers, and repeated words — running entirely in your browser with no upload. Paste text (up to ~50k characters comfortably), and inline highlights flag each issue with a plain-English explanation and a one-click suggested fix. The sidebar breaks issues into **Grammar**, **Punctuation**, **Style**, and **Clarity** so you can accept the must-fix errors first and treat style suggestions as optional. It is built for the pre-send audit: a cold email where a comma splice reads as sloppy, a college essay where a professor will circle every passive verb, a Substack post where readers churn on awkward phrasing, or a resume where a single typo kills the interview. Pair with the Readability Scorer to check reading level, the Passive Voice Detector for a deeper style pass, or the Word Frequency Counter to spot filler words you overuse. Runs entirely in your browser — no upload, no signup, no logs.
Common Use Cases
- Clean up a cold sales email before hitting send — no comma splices, no "there/their" slips
- Proofread a 1,500-word college essay for grammar and passive-voice overuse
- Polish a Medium or Substack post so the first paragraph reads professionally
- Sanity-check a resume or cover letter — one typo can end a job application
- Edit a translated document where English isn't the writer's first language
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Frequently asked questions
How to use Grammar Checker?
1) Open the tool. 2) Enter or upload your input. 3) Get your result instantly. Everything happens locally — nothing is uploaded.
When should I use Grammar Checker?
Use it before sending a client email, submitting a college essay, publishing a blog post, or shipping any writing where obvious grammar slips would cost you credibility.
Is Grammar Checker safe?
Yes. Grammar Checker runs 100% in your browser. Inputs are never uploaded, stored, or logged — safe for confidential content.
Will quality be affected by Grammar Checker?
Grammar Checker performs lossless operations — your content is not re-encoded or downgraded.
What formats does Grammar Checker support?
Grammar Checker supports Plain text and Markdown
Is Grammar Checker free?
Yes — Grammar Checker is completely free, with no registration, no watermarks, and no usage limits.
How does this compare to Grammarly?
It catches the same common errors — subject-verb, comma splices, apostrophes, wordiness, passive voice — without an account, subscription, or upload. Grammarly's edge is deeper AI-driven tone rewriting on premium; if that matters to you, use both. For privacy-sensitive text (legal drafts, medical notes, client contracts), stay here.
Does it catch every grammar mistake?
No local rule-based checker does — natural language is too messy. Expect it to catch the frequent, high-cost errors (agreement, punctuation, common word confusion) and to be quieter on nuanced style or specialized jargon. Always read your final draft once by ear.
Can I check text in Spanish, French, or German?
The rules are tuned for English. For other languages, use the [LINK:Text Statistics|/tool/text-statistics] tool for length checks and a native-language reviewer for grammar.