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Grammar Checker

Check your writing for 100+ common spelling, grammar, punctuation, and style errors. Instant client-side analysis.

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Paste text to check for 100+ common grammar and style issues

What We Check For

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50+ Spelling Errors

Common misspellings like "definately", "seperate", "occured", and many more.

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Grammar Rules

Subject-verb agreement, commonly confused words (your/you're, its/it's, etc.).

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Word Choice

Common malapropisms like "for all intensive purposes" or "escape goat".

Style & Conciseness

Wordy phrases, redundancies, and filler words that weaken your writing.

Need advanced grammar checking?

WriteScholar uses AI to understand context and provide comprehensive grammar analysis, style suggestions, and academic writing feedback.

Free Grammar Checker, Spelling, Punctuation, and Style Errors

Paste any text and the grammar checker scans it instantly for spelling mistakes, punctuation issues, capitalization slips, and common style problems. Each issue is flagged with a category and a suggested fix. No sign-up, no word limit, no quota.

How to use it

  1. Paste your text

    Copy your essay, email, or social post and paste it into the editor. The checker runs as soon as you stop typing.

  2. Read the issue list

    Errors are coloured by severity: red for spelling and grammar errors, amber for warnings (e.g. passive voice, run-on sentences), and blue for style suggestions (e.g. "consider replacing with...").

  3. Apply or skip each fix

    Click a suggestion to apply it; click "ignore" to skip. The text updates live so you can see the cleaned version build up as you go.

  4. Copy the corrected version

    Once you've cleaned every flagged issue, copy the corrected text. Paste it back into your essay, email, or whatever you started with.

When you'd use this

Final pass on a college essay before submission

Catches typos and missing commas a tired writer misses. Pair with the AI essay checker for content feedback, this tool is for surface-level errors.

Polishing a job-application email or cover letter

A single typo in a cover letter can sink a candidacy. Run it through here before hitting send, even a strong applicant looks careless with "thier" instead of "their".

Cleaning up a LinkedIn or X post

Posts with typos get fewer engagements. Quick check before you publish to keep your professional brand tight.

Editing a student newspaper article

Newspaper editors have to clean dozens of submissions. Drop each one in, fix the obvious issues, then focus your editorial time on structure and clarity.

Proofreading a research paper draft

Spelling and punctuation errors in a research paper signal carelessness even when the science is solid. Catch them here before peer review.

WriteScholar Grammar Checker vs the alternatives

Grammar tools all do similar surface-level checks. Differences appear at depth and pricing.

FeatureWriteScholarGrammarly FreeGrammarly PremiumHemingway
Spelling + punctuationYesYesYesLimited
Style suggestionsYesLimitedYesYes (different focus)
Vocabulary diversity checkYes (paraphrasing tool)Premium onlyYesNo
Plagiarism detectionNo (use Turnitin)NoYesNo
Tone analysisComingNoYesNo
Browser extensionComingYesYesNo
Sign-up requiredNoYesYesNo
CostFreeFree~$30/moFree / $20 desktop

Common mistakes to avoid

Subject-verb disagreement

The number of cars are increasing → The number of cars IS increasing. "Number" is singular even when the noun after it is plural. Same with "amount", "team", "group", "majority".

Comma splice

I went to the library, I forgot my book. Two independent clauses joined only by a comma. Fix: use a period, semicolon, or coordinating conjunction (and, but, so).

Their / there / they're confusion

"Their" = possessive. "There" = location. "They're" = they are. The grammar checker catches obvious cases but won't flag every misuse if the grammar is otherwise valid.

Apostrophe misuse

"It's" = it is. "Its" = possessive (no apostrophe). Plural nouns NEVER take apostrophes ("the 1990s", not "the 1990's"). Apostrophe-s indicates ownership or contraction, not a plural.

Run-on sentences

A sentence that joins multiple complete thoughts without punctuation. "I love writing it's my passion." Fix with a period, semicolon, or conjunction. Run-ons are the most common readability killer in student essays.

Misplaced modifier

"Walking down the street, the building looked tall." Did the building walk? No. Fix: "Walking down the street, I saw the tall building." The modifier should sit next to the noun it describes.

Capitalization slip-ups

i.e. → not capitalized after a period. e.g. → same. Months and days ARE capitalized. Seasons (spring, summer) are NOT. Compass directions are NOT (north) unless used as a region (the North).

Examples

Comma splice fix
Before
The experiment failed, the results were inconclusive.
After
The experiment failed; the results were inconclusive.

Two independent clauses need a semicolon, period, or coordinating conjunction (and/but/so), not just a comma.

Subject-verb agreement
Before
The list of recommendations have been finalised.
After
The list of recommendations has been finalised.

"List" is the subject (singular), not "recommendations". The verb agrees with the head noun, not the noun closest to the verb.

Active vs passive voice
Before
The data was analysed by the research team.
After
The research team analysed the data.

Active voice puts the actor first ("The research team"). Cleaner, more direct, easier to read. Use passive only when the actor is unknown or unimportant.

Vague pronoun reference
Before
The CEO told the manager that he should resign.
After
The CEO told the manager that the manager should resign.

"He" is ambiguous, does it refer to the CEO or the manager? Replace pronouns with proper nouns when there's any chance of confusion.

Tips and best practices

Read your work aloud

Reading aloud catches what your eye skips. Run-ons, awkward phrasing, missing words, all easier to hear than to see.

Fix issues in passes, not all at once

First pass: spelling. Second pass: punctuation. Third pass: style. Trying to fix everything at once is how you miss things.

Don't accept every suggestion

Grammar tools are rule-based. They flag violations even when your intentional choice is better. Trust your ear over the tool when you have a reason.

Save the grammar pass for last

Polishing grammar before you've finished editing for content is wasted work. Get the argument right first; check spelling and punctuation last.

Use the readability score for sentence length

If your readability score is 14+, you're writing in too-long sentences. Pair the grammar checker with our readability tool for the full clarity check.

Keep British vs American consistent

Don't mix "colour" with "favorize". Pick US or UK English at the start and stick with it. The grammar checker accepts both but doesn't flag mixing.

Glossary

Independent clause
A clause that can stand alone as a sentence. Has a subject and a verb. "She studies." is an independent clause.
Dependent clause
A clause that can't stand alone, needs an independent clause to complete the meaning. "Because she studies..." is a dependent clause.
Comma splice
Two independent clauses joined only by a comma. Always an error in formal writing. Fix with a period, semicolon, or conjunction.
Run-on sentence
Two or more independent clauses with no punctuation or conjunction between them. "She studies he doesn't." is a run-on.
Modifier
A word or phrase that describes another word. "Quickly" is a modifier of "ran" in "She quickly ran".
Dangling modifier
A modifier with no clear word to modify. "Walking home, the rain started." (Who was walking? The rain didn't.)
Active voice
Subject performs the verb action. "She wrote the essay."
Passive voice
Subject receives the verb action. "The essay was written by her." Generally weaker; use sparingly.
Conjunction
Word that joins clauses. Coordinating: and, but, or, so, yet, for, nor (FANBOYS). Subordinating: because, although, while, since.
Apostrophe
Punctuation mark. Indicates possession ("Sarah's book") or contraction ("don't" = "do not"). NOT used for plurals.

Grammar errors are the cheapest marks to lose. They have nothing to do with the quality of your argument or research, and yet a paper riddled with them reads as careless and gets graded down accordingly. A two-minute pass through a grammar checker before submitting solves 90% of the issue.

Frequently asked questions

Yes, completely free with no sign-up. Unlike Grammarly, there's no premium version or paywall on advanced suggestions; what you see is what you get.

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