Grammar checker · the last pass before you submit

Catch mistakes before you submit.

Check your text for common spelling and grammar mistakes, with an explanation for every fix. Free online grammar checker.

Built to spot text from tools like these

  • ChatGPT
0 / 4,000 characters

Used by students at the world's top universities

  • Harvard
  • MIT
  • Stanford
  • Oxford
  • Cambridge
  • ETH Zürich
  • Yale
  • Princeton
  • Imperial College London
  • TUM
  • Columbia
  • UCL
  • HKU
  • Penn
  • LSE
  • HKUST
  • Cornell
  • Edinburgh
  • CUHK
  • Brown
  • NUS
  • Dartmouth

Based on individual use by students and graduatesno affiliation

What people say

4.538

Real reviews from people who use the service. Emails are partly hidden, and reviews are shown in the language they were written in.

I send twenty client emails a day in a language that isn't my first. Thirty seconds here before hitting send has saved me from a lot of small embarrassments.
ar***@gmail.com
Ran my cover letter through it and found three awkward constructions I'd read past ten times. It explains the fix rather than just replacing the text.
vi***@gmail.com
I publish blog posts without an editor. This is the closest thing to a second pair of eyes I have, and it's free with no signup.
ma***@gmail.com
Academic writing in English as a second language is brutal. This catches article and preposition errors that every other free checker misses.
ib***@gmail.com
I check reports at the end. It leaves proper nouns alone.
om***@gmail.com
I use it before publishing posts. Spelling and style are listed separately.
na***@outlook.com
For me, I use it before publishing posts. It leaves proper nouns alone.
se***@icloud.com
In my experience, I use it before publishing posts. It explains why, so I actually learn something.
om***@outlook.com
I run emails through it before sending. In my experience, it leaves proper nouns alone.
de***@proton.me
A reason for every fix
What changed, and why, item by item
Free check
Rule-based check after sign-in
Minimal edits
Your style stays, only mistakes change
Nothing stored
Used to check, not kept
How it works

Paste it, and fix only what's wrong.

01

Paste your draft

A cover letter, report or email as it is. Up to 4,000 characters at a time.

02

See the slips

Common misspellings and clear grammar mistakes are shown as “this → that”, with a short reason.

03

Go further with AI

AI mode also smooths awkward phrasing and repeated expressions in one pass.

FAQ

Questions people ask.

Is the grammar checker free?
Yes. Sign in with Google and run the free check — it's rule-based and doesn't use any credits.
What does it catch?
Common misspellings and clear grammar slips — each correction comes with a short reason.

One more look before you hit submit.

The rule-based check is free after sign-in. Use a credit only when you want the AI to smooth the grammar as well.