Grammar checking used to mean either paying for Grammarly, relying on Word's underline squiggles, or reading through your own writing and missing half the errors because you know what you meant to say. AI-powered grammar checkers have changed that. They understand context, not just rules — which means they catch errors that rule-based tools miss and avoid flagging things that are technically unusual but perfectly correct.
Filero's grammar check tool is free, requires no account, and works on any text you paste in — emails, cover letters, reports, social media posts, academic writing, or anything else.
How to check grammar for free
Open Filero's free grammar checker and follow these steps:
- Paste your text into the input field.
- Click Check Grammar.
- The AI returns a corrected version of your text with the changes explained.
- Copy the corrected text to use in your document, email, or post.
There is no sign-up, no file upload limit, and the tool works on any device including mobile.
What grammar errors does it fix?
Subject-verb agreement."The team are ready" versus "the team is ready" — this class of error is easy to miss when you're writing quickly and common in both directions depending on whether you're writing for British or American audiences.
Punctuation errors. Comma splices, missing apostrophes in contractions, incorrect use of semicolons, and run-on sentences are caught and corrected.
Tense consistency. Mixing past and present tense within a paragraph is a common error in reports and case studies. The checker identifies the intended tense from context and flags inconsistencies.
Spelling mistakes.Including homophones — "their", "there", and "they're" — which spell checkers based on dictionaries alone cannot catch because all three are spelled correctly.
Awkward phrasing and word choice. Where the grammar is technically correct but the sentence is unnecessarily complex or unclear, the AI will often suggest a simpler alternative.
Grammar check versus spell check — what is the difference?
Spell check works on individual words: it checks whether each word exists in the dictionary. It does not understand the relationship between words or the meaning of a sentence. A spell checker will not catch "I bought to apples" because "to" is a real word.
Grammar check understands the sentence as a whole. It catches errors that require understanding context — wrong homophones, incorrect word forms, missing articles, tense conflicts, and agreement errors. A full AI grammar checker does both simultaneously.
When is grammar checking most useful?
Before sending professional emails. A typo in a client email or job application creates an immediate negative impression. A quick grammar check before sending takes five seconds and catches the kind of errors that autocorrect misses.
When writing in your second language. Grammar rules differ significantly between languages, and errors that are correct in one language are wrong in English. AI grammar checking is particularly helpful for non-native English writers because it corrects based on the intended meaning, not just the rules in isolation.
When editing your own work. You know what you meant to write, which makes it easy to read over errors without seeing them. An AI checker reads what is actually there rather than what you intended.
Frequently asked questions
Is the grammar checker free with no account?
Yes, completely free with no account required. There is no word limit or trial period.
Does it work for Australian and British English?
The AI understands regional spelling variants and does not flag British or Australian spellings (such as "colour", "organise", or "centre") as errors. If you have a preference for a specific dialect, you can mention it in your text or note it before running the check.
Can I check grammar in languages other than English?
The tool can check text in many other languages, though its accuracy is strongest in English. For non-English grammar checking, results are generally good for major European languages.
How is it different from Grammarly?
Grammarly is a full platform with browser extensions, a desktop app, a tone detector, and a plagiarism checker — and it costs money beyond the basic free tier. Filero's grammar checker is a focused, free tool: paste in text, get it checked, copy the result. No extensions to install, no account to create, and no data retained.
Ready to try it?
Use Filero's free Grammar Check tool. No account needed, works on any device.
Open Grammar Check