Text Analysis Tools
Grammar Checker (Rule-Based)
Paste English text and get a list of common, mechanical problems with the surrounding context: repeated words, a or an before the wrong sound, double spaces, spaces before punctuation, missing spaces after commas, sentences that start with a lowercase letter, a lowercase “i”, about 100 frequent misspellings and missing apostrophes, and common word mix-ups such as “should of” or “more then”. Optional style notes flag very long sentences, possible passive voice and heavy use of filler words. One button applies the mechanical fixes. This is a rule-based checker, not an AI model. It has no full dictionary and no sentence parser, so it misses most spelling and grammar mistakes and can flag text that is correct. Read every suggestion before accepting it. Your text stays in your browser.
How to use it
- Paste your text.
- Read the numbered list: errors are almost always wrong, “check” items depend on context and style notes are optional.
- Press Apply mechanical fixes to correct the clear errors, then read the result.
Example
“i think the the cat is a apple” is flagged for the lowercase “i”, the repeated “the” and “a apple”. “You should of gone” is flagged and corrected to “should have”.
Related writing tools
Check how easy a text is to read with the readability checker, count words with the word counter, compare two versions with text compare and convert headline capitalisation with the title case converter.
Understanding the suggestions
- Errors are patterns that are almost always wrong, such as a repeated word or “should of”. The fix button changes only these.
- Checks depend on context. “Its a” is usually “it’s a”, but you should decide.
- Style notes are prompts, such as a very long sentence or possible passive voice. Passive voice is sometimes the right choice.
Use Accept for one change at a time, Ignore when the tool is wrong, and compare the original with the corrected text before you copy it.
What it cannot do
It does not understand meaning, so it will not catch a correctly spelled wrong word, faulty logic, tense errors in most sentences or awkward phrasing. It has a short list of common misspellings, not a dictionary. It is a quick first pass for mechanical slips and does not replace reading your work aloud, a spell checker or a human proofreader, especially for anything important.
Common mistakes
- Accepting every suggestion without reading it.
- Assuming no flags means no errors.
- Pasting text in another language: it is built for English only.
Questions
Is this an AI grammar checker?
No. It uses fixed rules and word lists. It does not understand sentences, so it cannot catch most grammar errors, check agreement or judge word choice. Tools that do that use language models, which this page does not.
Why didn't it find my spelling mistake?
It has no full dictionary. It knows about 100 very common misspellings and missing apostrophes only. Use your browser's or word processor's spell checker as well.
Why was correct text flagged?
Rules can be wrong: “a” before an unusual word, a deliberate repeat, or an abbreviation can look like a mistake. Items marked “check” depend on context, and the mechanical fix button changes only likely errors.
Which languages does it support?
English only.
Is my text uploaded?
No. It is checked in your browser and never sent anywhere.
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