Issues found
0Check Grammar to begin.
What is a grammar checker?
A grammar checker is a software tool that reads your text and identifies errors in grammar, spelling, punctuation, and writing style — then suggests corrections. This tool uses LanguageTool, a free, open-source grammar engine that analyzes text using linguistic rules and statistical models, detecting hundreds of error types across more than 30 languages.
Unlike a basic spellchecker (which only flags misspelled words), a grammar checker understands context. It can detect when a correctly-spelled word is used incorrectly ("their" vs "there"), when subject-verb agreement is wrong ("he go" instead of "he goes"), and when punctuation is missing or misplaced.
Types of errors detected
| Error type | Example | Correction |
|---|---|---|
| Subject-verb agreement | She go to school every day. | She goes to school every day. |
| Wrong article | I have a apple. | I have an apple. |
| Apostrophe misuse | Your going to love it. | You're going to love it. |
| Spelling mistake | I recieve your email. | I receive your email. |
| Comma splice | I came, I saw, I conquered. | I came; I saw; I conquered. |
| Double space | Hello world. | Hello world. |
| Redundant words | The reason is because… | The reason is… |
How to use the grammar checker
Paste or type your text
Type directly into the editor, paste from your document, or upload a .txt file using the Upload button.
Select your language
Choose the language your text is written in from the dropdown. Supports English (US, UK, AU), French, German, Spanish, Arabic, and 25+ more.
Click Check Grammar
The tool sends your text to LanguageTool's free API and receives a list of all detected issues within seconds.
Review highlighted errors
Errors are highlighted in colour-coded underlines — red for grammar/spelling, yellow for punctuation, blue for style. Click any underline to see suggestions.
Apply corrections
Click a suggestion pill to apply it instantly, or click "Correct all" to apply every suggestion at once. Download the corrected text when done.
Frequently asked questions
Yes. This tool is powered by LanguageTool's free public API — no account, no subscription, no word limit. LanguageTool is open-source software available under the LGPL licence.
Yes — your text is sent to LanguageTool's public API (api.languagetool.org) for grammar checking. This is how all grammar checkers work; text must be analyzed server-side by the language model. LanguageTool's privacy policy states they do not store text submitted to the free public API beyond the duration of the request. ToolBase itself never receives or stores your text.
The tool supports over 30 languages including English (US, UK, Australian), French, German, Spanish, Portuguese, Italian, Dutch, Polish, Russian, Arabic, Chinese, Japanese, Ukrainian, and more. Select your language from the dropdown before checking.
The tool checks spelling against the variant you select. British English uses "colour," "centre," "analyse"; American English uses "color," "center," "analyze." Selecting the wrong variant will flag correct spellings as errors — always match your intended audience.
Correct all applies the first suggested replacement for every detected error simultaneously. For most straightforward grammar and spelling errors, this is the right fix. For nuanced style suggestions, it's worth reviewing each one manually before applying — click individual error highlights to choose which suggestion to apply.
Absolutely. The grammar checker works well for academic writing, essays, research papers, and reports. It catches common errors that trip up students — subject-verb disagreement, wrong articles, misused punctuation, and redundant words. Always give your text a final manual read after applying suggestions.