Free Grammar Checker Online — Fix Errors in Seconds, No Sign Up
Bad grammar costs you more than you think. Studies show that 43% of hiring managers will reject a resume because of grammatical errors. Online listings with spelling mistakes convert at half the rate of clean ones. Emails with grammar errors are perceived as less trustworthy.
Toolora's free grammar checker catches mistakes in real time using the LanguageTool API — no account required, no daily limit, supports 6 languages.
What the Grammar Checker Catches
Spelling Errors
The most obvious category — misspelled words, typos, and incorrect homophones (their/there/they're, your/you're, its/it's).
Grammar Mistakes
Subject-verb agreement errors, incorrect verb tenses, missing articles, and faulty sentence structure.
Punctuation Problems
Missing commas before coordinating conjunctions, incorrect apostrophe use, missing hyphens in compound adjectives.
Style Issues
Passive voice overuse, wordy phrases ("due to the fact that" → "because"), redundant expressions, and awkward constructions that are grammatically correct but unclear.
Common Confusables
- affect vs. effect
- who vs. whom
- fewer vs. less
- complement vs. compliment
How to Use the Grammar Checker
- Go to toolora.org/tools/grammar-checker
- Paste or type your text in the box
- Select your language variant (US English, UK English, German, French, Spanish, Portuguese)
- Click Check Grammar
- Review each flagged issue — click any suggestion to apply it automatically
- Copy your corrected text
The Most Common Grammar Mistakes in English
1. Its vs. It's
- It's = it is or it has. "It's raining." "It's been a long day."
- Its = possessive. "The company updated its policy."
2. Your vs. You're
- You're = you are. "You're doing great."
- Your = possessive. "Is this your bag?"
3. Then vs. Than
- Then = at that time. "We ate dinner, then watched a film."
- Than = used for comparisons. "He's taller than I expected."
4. Dangling Modifiers
"Walking down the street, the trees looked beautiful." — Who was walking? Fix: "Walking down the street, I noticed the trees looked beautiful."
5. Run-on Sentences
Two complete thoughts joined without proper punctuation. Fix: separate with a period, semicolon, or conjunction.
6. Comma Splices
Joining two independent clauses with only a comma: "It was cold, I wore a coat." Fix: "It was cold, so I wore a coat."
7. Subject-Verb Agreement
"A list of items were left on the table." The subject is "list" (singular). Correct: "A list of items was left on the table."
Grammar in Different Contexts
Professional Emails
Professional emails set the tone for every business relationship. Before sending any important email, paste it into the grammar checker. Pay special attention to the subject line, the opening line, and calls to action.
Resumes and Cover Letters
These documents get seconds of attention. Errors here are disqualifying. Run every resume through a grammar checker after spell-check — spell-check will not catch "manger" instead of "manager" because both are real words.
Blog Posts and Articles
Content that is hard to read drives up bounce rate and reduces time-on-page — both indirect ranking signals for SEO.
Grammar Checker vs. Spell Checker: What Is the Difference?
| Feature | Spell Checker | Grammar Checker |
|---|---|---|
| Catches misspelled words | Yes | Yes |
| Catches wrong-but-real words (there/their) | No | Yes |
| Identifies structural problems | No | Yes |
| Suggests style improvements | No | Yes |
| Understands context | No | Yes |
A spell checker would miss "I are going to the store" (all words are real). A grammar checker catches it immediately.
Frequently Asked Questions
Is the grammar checker completely free?
Yes. No account, no word limit per day, no watermark on results.
How many characters can I check at once?
The tool handles texts up to around 10,000–15,000 characters in one pass. For longer documents, split into sections.
Does it support languages other than English?
Yes — US English, UK English, German, French, Spanish, and Brazilian Portuguese.
Will it catch AI-generated content errors?
It checks grammar, not whether content is AI-generated. However, AI text often contains specific stylistic patterns that the style-checker flags.
Is my text stored or used for training?
Text goes to the LanguageTool API for analysis. LanguageTool's privacy policy states they do not permanently store text submitted via the API.
Also useful: Meta Description Generator for SEO-optimized copy, and Word to PDF Converter for submitting your corrected documents.