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Grammar Checker

Detect repeated words, missing capitalisation, and common misspellings.

Grammar and spellingPunctuation and spacingExplained suggestionsRuns in your browser
Every check runs in your browser. Your text is not uploaded, and no AI service is involved - which also means the checks are pattern-based, not a full understanding of your writing.

Review suggestions before applying them. Grammar tools can miss context or suggest changes you may not want.

Built from the suggestions you have applied. Run the checker again after editing the source text.

Total issues

10

Active suggestions found.

Grammar

4

Sentence and usage checks.

Spelling

2

Common typo patterns.

Punctuation

3

Spacing and punctuation checks.

Clarity/style

1

Simple clarity patterns.

Word count

40

Source text words.

Character count

222

Source text characters.

Processing method

In your browser

Pattern checks only. Nothing is uploaded.

Suggestions and Corrected Text Panel

GrammarSeverity: medium

Original

i

Suggestion

I

The first-person pronoun “I” is capitalized in English.

SpellingSeverity: medium

Original

recieved

Suggestion

received

Common typo pattern: “recieved” is usually written as “received”.

PunctuationSeverity: medium

Original

.I

Suggestion

. I

A space is usually needed after sentence-ending punctuation.

ClaritySeverity: low

Original

very very

Suggestion

very

Repeated intensifiers can weaken clarity.

PunctuationSeverity: low

Original

Suggestion

Multiple spaces can make text look uneven. Replace them with a single space.

GrammarSeverity: high

Original

could of

Suggestion

could have

“Of” is not a verb. The intended phrase is “could have”, “would have”, or “should have” — the sound of the contraction “could’ve” is what causes this.

PunctuationSeverity: low

Original

!!

Suggestion

!

Repeated punctuation can look informal or excessive. Use one mark unless the style is intentional.

SpellingSeverity: medium

Original

definately

Suggestion

definitely

Common typo pattern: “definately” is usually written as “definitely”.

GrammarSeverity: medium

Original

a important

Suggestion

an important

Use “an” before a vowel sound and “a” before a consonant sound. “important” starts with a vowel sound.

GrammarSeverity: high

Original

we was

Suggestion

we were

“We”, “they”, and “you” take “were”, not “was”.

Pattern checks you can review

Repeated words, spacing and punctuation, sentence capitalisation, common misspellings, and a short list of frequent grammar mistakes — each with an explanation.

Safe, anchored edits

Every suggestion is tied to one exact position in your text, so applying it never rewrites a matching word somewhere else.

Nothing leaves your browser

The checks run in this page. Your text is not sent to a server and is not stored anywhere.

Dynamic Writing Insights

Found 10 possible grammar, spelling, punctuation, or clarity issues.
Your text contains 40 words and 222 characters.
Review suggestions before applying them because context matters.
Checks cover repeated words, spacing and punctuation, sentence capitalisation, a fixed misspelling list, and a small set of grammar and clarity phrases.
Web addresses, email addresses, decimals, filenames, and abbreviations such as Dr. and U.S. are skipped so they are never edited by mistake.
Everything runs in this page in your browser. No text is sent to a server.

How Grammar Checking Works

This checker looks for a fixed set of text patterns rather than reading your writing for meaning.

Spelling is matched against a list of frequently mistyped words, so unusual misspellings are not caught.

Punctuation checks look at spacing, sentence endings, repeated marks, and trailing spaces.

Clarity checks flag a few wordy phrases and repeated intensifiers. They do not rewrite sentences.

Web addresses, email addresses, numbers, filenames, and abbreviations are skipped so the rules cannot damage them.

Automated suggestions should always be reviewed by the writer.

Grammar, Spelling, Punctuation, and Style Explained

Grammar

Sentence capitalisation, repeated words, lowercase “i”, a/an before well-known words, and a few frequent mistakes such as “could of”.

Spelling

Replacements drawn from a fixed list of commonly mistyped words.

Punctuation

Spacing around punctuation, missing spaces after sentences, repeated marks, and trailing spaces.

Clarity

Wordy phrases such as “in order to” and repeated intensifiers such as “very very”.

Accuracy, Privacy, and Editing Limitations

Suggestions may be context-dependent, so read each one before applying it.
Creative, technical, or domain-specific writing may need manual review.
Names, product terms, code, citations, and acronyms may be incorrectly flagged.
Spelling uses a fixed word list, not a full dictionary, so most misspellings are missed.
There is no check for verb tense, subject-verb agreement in general, or its/it’s.
US and UK spelling differences are not detected.

Common Grammar Checking Examples

Repeated word

the the → the

Missing capitalization

i went home → I went home

Missing space

Hello.World → Hello. World

Punctuation spacing

Hello , world → Hello, world

Simple typo

recieve → receive

Excessive punctuation

Great!! → Great!

Concise wording

in order to → to

Could of

could of gone → could have gone

Plural was

we was late → we were late

Article

a important update → an important update

Left alone

https://example.com/report.txt

Student, Work, and Writing Use Cases

Checking essays
Editing emails
Proofreading blog posts
Improving product descriptions
Reviewing reports
Checking social captions
Polishing resumes or cover letters
Editing study notes
Cleaning drafts before publishing
Improving professional writing

Privacy and AI/Local Processing Notes

Every check runs in this page in your browser.
No account is required.
Your text is not sent to a server and is not stored.
Nothing is saved between visits — closing or clearing the page removes the text.
No AI or third-party grammar service is involved.
The checks are pattern-based, so they are limited by design.

Method Explanation

  1. 1. Read the source text.
  2. 2. Mark the stretches that must not be edited: web addresses, email addresses, decimals and version numbers, filenames, times, and abbreviations such as Dr. and U.S.
  3. 3. Run the pattern checks for spacing, repeated words, punctuation, capitalisation, common typos, and the selected grammar and clarity phrases, skipping anything that touches a marked stretch.
  4. 4. Record each suggestion against the exact position it was found at, with a replacement and an explanation.
  5. 5. Categorise issues as grammar, spelling, punctuation, or clarity.
  6. 6. Let you apply or ignore suggestions individually, or apply them all.
  7. 7. Rebuild the corrected text from the applied suggestions only where the original text is still present at that position, skipping any suggestion that overlaps one already applied.

Frequently Asked Questions

A grammar checker reviews text for possible grammar, spelling, punctuation, and clarity issues. This one runs a fixed set of pattern checks in your browser.

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