AI Grammar Checker
Free Grammar Check

AI Grammar Checker

This grammar checker reads your writing for grammar, spelling, and punctuation mistakes and marks each one where it sits. Accept the suggestions one at a time or correct the whole document at once.

  • Grammar, spelling, and punctuation in one pass
  • Errors highlighted inside the sentence
  • Fix All applies every correction at once
  • Free to use with no limit on checks
Check Grammar

What Is a Grammar Checker

A grammar checker reads a piece of writing and marks the mistakes in grammar, spelling, and punctuation that a spell check leaves behind.

A grammar checker takes the text you type, paste, or upload and analyses it sentence by sentence. The result is not a rewrite but a marked-up version of your own writing, with each error flagged in place and a correction attached to it. The three categories can be reviewed together or separately. That matters because a draft at different stages needs different things: a piece being tightened wants grammar and punctuation, while a final read wants spelling.

Why Choose This Grammar Checker

The controls decide what counts as an error and how much of the correction work is handed back to the tool.

Narrow the check to one error type

Grammar, spelling, and punctuation can be reviewed together or one at a time through the filter. A focused pass returns a shorter list, which keeps attention on the category the draft actually needs.

Apply every correction in one action

Fix All accepts the pending suggestions across the text at once, and the counter beside it shows how many are waiting. Correcting individually stays available for anything that needs a judgement call.

See each error inside its sentence

Mistakes are highlighted in the text rather than collected into a separate list. Reading the sentence with the error marked is what makes it clear whether the suggestion improves the meaning or only the grammar.

Check up to 1500 words in one run

A long document can be brought in a section at a time without splitting it into fragments. Each pass covers a complete piece of the text, so nothing is left unread between runs.

Use it without a limit on checks

The tool is free and does not ration how often it runs. A paragraph can be checked as readily as a chapter, which changes the behaviour from saving the check for a finished document to running it while writing.

Write in more than one language

The analysis is not tied to English alone. Text in other supported languages can be checked for the same categories of error, without switching between separate tools for each draft.

AI Grammar Checker

AI Grammar Checker

@tusummary

Pain point: spell check finishes and the sentence is still wrong

Spelling tools catch typos and leave the sentence around them untouched. A word can be spelled correctly in the wrong form, a verb can disagree with its subject, and the document still passes a spell check without a single mark on it. A grammar checker reads the sentence rather than the word. It marks the error where it sits and attaches the correction to it, which is the difference between knowing something is wrong and knowing what it should say instead.
Check Grammar
Sentence with a grammar error marked
AI Grammar Checker

AI Grammar Checker

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Pain point: one comma changes what the sentence claims

Punctuation carries meaning. A missing comma turns a list into an aside, a misplaced apostrophe changes who owns what, and a hyphen in the wrong place makes a compound say the opposite of what was intended. The checker treats punctuation as a category of its own, separate from grammar and spelling. That separation makes it simple to review only the punctuation in a finished draft without rereading every other suggestion.
Check Grammar
Sentences with commas added and removed
AI Grammar Checker

AI Grammar Checker

@tusummary

Pain point: the same mistake runs through the whole document

Errors are rarely isolated. A writer who joins two clauses with a comma does it in the first chapter and again in the ninth, and fixing those one at a time is a slow way to work through a long text. Corrections can be accepted individually or applied across the document in a single action. The second option is what turns a final pass on a long piece into a task measured in minutes rather than in an evening.
Check Grammar
Document with repeated errors marked
AI Grammar Checker

AI Grammar Checker

@tusummary

Pain point: a fifteen-hundred-word ceiling and a four-thousand-word report

Every tool has an input ceiling, and knowing where it sits keeps a check from stopping halfway through a chapter and leaving the rest unread. At 1500 words per run, a long report can be checked section by section against the same standard. Each pass is complete on its own, and the corrections land in the document before the next section goes in.
Check Grammar
Report split into sections for checking
AI Grammar Checker

AI Grammar Checker

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Pain point: the deadline leaves no room for a proofreading pass

Proofreading is the task that gets dropped last. It sits at the end of the schedule, so it is the first thing to lose its slot when a piece runs over, and the errors go out with it. A check that takes seconds can be run between other tasks instead of being scheduled as a separate block. The mistakes come back marked, and the only decision left is whether to accept the suggestion.
Check Grammar
Writer working against a deadline
AI Grammar Checker

AI Grammar Checker

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Pain point: only one kind of error is worth looking at today

Reviewing everything at once produces a long list, and most of it is not what the draft needs. A piece being tightened for style does not benefit from a spelling report, and a text going to print does not need style advice. The error categories can be filtered, so a pass can cover grammar, or spelling, or punctuation on its own. Working through one category at a time keeps the review anchored to the reason it is being done.
Check Grammar
Filters for grammar, spelling, and punctuation
AI Grammar Checker

AI Grammar Checker

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Pain point: English is not the language the writer thinks in

Second-language writing produces a recognisable set of errors: articles, prepositions, and verb forms that follow the rules of another language. They are the errors a reader notices first and the writer is least likely to see. A checker that reads context flags them against standard English usage. Reading the suggestions is also how the patterns get learned, since the same correction keeps appearing in the same place until the habit changes.
Check Grammar
Two-language draft with corrections in the margin
AI Grammar Checker

AI Grammar Checker

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Pain point: a class or a team handing in written work

When several people write for the same publication, quality drifts with whoever is on the schedule. One person's comma usage becomes the house style by accident. Running every piece through the same grammar checker before it is submitted gives everyone a comparable baseline. The corrections come out consistent because the tool is, which lets an editor review content rather than punctuation.
Check Grammar
Team documents lined up for review
AI Grammar Checker

AI Grammar Checker

@tusummary

Pain point: a check that costs money gets rationed

Tools charged per use are saved for the important document, and everything else goes out unchecked. The habit is understandable and it is also how errors reach readers. The checker is free to use and does not limit how many times it runs, so a single paragraph can be checked as readily as a manuscript. That turns a final ritual into something done while writing.
Check Grammar
Screen showing several runs of a check

How to Use This Grammar Checker

Four steps, and the last one decides how much of the correction work is automatic.

Step 1

Add the text

Type directly into the input field, paste the passage in, or upload a file. The counter below shows how much of the 1500-word allowance the text is using.

Step 2

Choose what to check

Leave the filter on All to review everything, or narrow it to grammar, spelling, or punctuation when only one category is worth a look.

Step 3

Run the check

Press Check Grammar and the tool returns a marked version of your text. Every flagged mistake is highlighted where it appears.

Step 4

Fix one by one or all at once

Accept suggestions individually to keep decisions in your hands, or press Fix All to clear the counter in a single action. Clear empties the field for the next piece of writing.

Who Uses a Grammar Checker

The tool fits anywhere written work has to be clean before someone else reads it.

SW

Students submitting work

Assignments and essays

A marked-up draft shows which mistakes keep returning across a piece. That list is what makes the next essay easier to write, not just the current one easier to hand in.

CW

Content writers

Blogs and articles

Filing several pieces a week leaves no time for a full proofread. A filter limited to punctuation catches the errors that a spell check never sees and that a reader always does.

TM

Teachers marking papers

Class assignments

Running a set of assignments through the same check puts them on one baseline. The marking time then goes into what the writing argues rather than into circling the same comma error thirty times.

Frequently Asked Questions

Access, coverage, and how much the result can be trusted, answered in the order people usually ask.

Check the draft before the reader does

Add the text, pick the category worth reviewing, and correct the marked errors one at a time or in a single pass.

Check Grammar
The Final Read

Accept the corrections you agree with

A grammar checker reports what breaks a rule, and rules are not always what a sentence needs. Fixing every suggestion without reading it can flatten a voice or change a meaning the writer intended. Use the marks as a list of things to look at, then decide which ones the sentence actually wants.