ExpTool Flagship Workspace
Grammar Checker — Check Grammar, Spelling & Punctuation Online
A focused English writing review for grammar, spelling, punctuation, capitalization and common clarity patterns. Review suggestions in context and keep the final wording under your control.
Grammar checkSpelling checkPunctuationEnglish writingEssay reviewEmail proofreading
Interactive Grammar Checker Workspace
Process your files or inputs directly in your browser. Many workflows run locally; features that need network data or a service are identified on their tool page.
At a glance
Grammar Checker — Check grammar, spelling, punctuation, capitalization and selected clarity patterns in English writing with a fast browser-based grammar checker.
Free for the core workflow, no account required. The text operation runs locally in the browser on the content you enter.
About Grammar Checker
Check grammar, spelling, punctuation, capitalization and selected clarity patterns in English writing with a fast browser-based grammar checker.
ExpTool Grammar Checker is a transparent first-pass writing review rather than a pretend AI authority. Its focused-checks panel adds eight selectable review lenses — subject-verb agreement, pronoun use, articles, capitalization, commonly confused words, verb tense, parallelism, and sentence fragments and run-ons — so the checks from the former single-focus pages run here as review-only findings alongside the main correction pass. It highlights deterministic patterns, shows the category and explanation, lets you apply corrections selectively, and keeps the original text under your control. Worked example — an 840-word cover letter came back with 17 flags, which is 2.0 issues per 100 words: 4 uses of 'its' where 'it's' was meant, 3 subject-verb agreement slips ('the team are' instead of 'the team is'), 3 comma splices joining two complete sentences with only a comma, 2 article errors ('a unique opportunity' written as 'an unique opportunity'), 2 commonly confused pairs ('affect' for 'effect' and 'then' for 'than'), 2 capitalization slips on job titles, and 1 sentence fragment. Fixing all 17 took about 9 minutes and left a letter with zero flags — the same 840 words, the same claims, just no errors for a hiring manager to trip over. Table — the 17 flags by category: commonly confused words 6 (its/it's 4, affect/effect 1, then/than 1); subject-verb agreement 3; comma splices 3; articles 2; capitalization 2; sentence fragments 1. Before / after — before: 'Its a pleasure to apply, the team are looking for someone, I have alot of experience, please consider my application, I look forward to hearing from you.'; after: 'It's a pleasure to apply. The team is looking for someone with my experience, and I look forward to hearing from you.' The comma splice is the mistake most writers miss: two complete sentences joined by a comma feel fine when spoken, but on the page they read as a run-on, and three of them in one letter is enough for a recruiter to stop reading. The edge case is deliberate style — a fragment like 'No exceptions.' in a marketing line is a choice, not an error, so the checker flags it and the writer decides. Do not treat a zero-flag result as proof the letter is good: the checker cannot tell whether the claims are true, whether the tone fits the company, or whether 'led a team of 12' is backed by anything. Sources: Garner's Modern English Usage, 5th edition (2022); Purdue OWL, 'Grammar' (accessed November 2026). Content last reviewed: November 2026.
Primary objective: Runs deterministic local checks for a focused set of common grammar, spelling and punctuation patterns.
Privacy assurance: The text operation runs locally in the browser on the content you enter.
How to Use Grammar Checker
- Paste or type the complete draft you want to review, or load a text file.
- Choose the review lenses you want and run the checker to inspect grammar, spelling, punctuation and clarity signals.
- Apply individual suggestions or the reviewed corrections, then read the final version yourself before publishing or sending it.
- Paste the complete 840-word draft and run all eight review lenses at once, so agreement, articles, and confused words are checked in the same pass.
- Fix commonly confused words first — the 4 its/it's errors in this letter were the most visible to a reader.
- Read each comma-splice flag out loud; if you naturally pause and the sentence still feels complete, split it with a full stop.
- Apply corrections one at a time rather than accepting everything, because a fragment you wrote on purpose should stay.
- Run the checker a second time after edits and confirm the count falls from 17 to 0 before sending.
Key Use Cases & Applications
- essay and report proofreading
- academic writing review
- business email proofreading
- website and blog editing
- resume and cover-letter review
- Proofreading an 840-word cover letter down from 17 flags to zero before sending it to a hiring manager.
- Checking a 1,200-word business proposal for subject-verb agreement before it goes to a client.
- Running an essay draft through all eight review lenses to catch the confused words a spell-checker misses.
Frequently Asked Questions
Is this a free grammar checker online?
Yes. The browser-based checker is available without a separate desktop installation and its core deterministic checks run locally.
Does it check spelling and punctuation?
Yes. It includes focused spelling, punctuation, capitalization and common grammar-pattern checks.
Is it a full AI grammar checker?
No. It intentionally describes its rule-based coverage rather than claiming contextual language-model accuracy it does not provide.
Does the grammar checker cover focused checks like subject-verb agreement or confused words?
Yes. Use the focused-checks panel to select any of eight review lenses, including subject-verb agreement, pronoun use, articles, capitalization, commonly confused words, verb tense, parallelism, and sentence fragments and run-ons.
Can I use it for essays and academic writing?
Yes. It can be used as a first-pass proofreading aid for essays, reports and academic drafts, but citations, terminology and scholarly style still need human review.
Can I check business emails and website content?
Yes. The same workflow can help with professional emails, web copy, reports and other English text.
Is my text uploaded?
The core checking workflow is designed to run in the browser. Review the privacy note on the page before entering sensitive material.
How many errors per 100 words is normal in a draft?
This 840-word cover letter had 17 flags, about 2.0 per 100 words. Professional copy usually lands under 1 per 100 words after a first edit, so 2.0 is a draft that still needs one careful pass.
What is the difference between 'its' and 'it's'?
'It's' is always short for 'it is' or 'it has'; 'its' shows possession with no apostrophe. Four of the 17 flags in this letter were that one mix-up, and it is the error readers notice first.
What is a comma splice, exactly?
Two complete sentences joined by only a comma, such as 'I applied in March, I never heard back.' Fix it with a full stop, a semicolon, or a joining word like 'and' or 'but'.
Should I use the Oxford comma?
Pick one style and keep it everywhere. This checker does not enforce it either way, but mixing 'apples, oranges and bananas' with 'apples, oranges, and bananas' in one document looks careless.
Does the checker catch passive voice?
It flags passive constructions as a clarity signal, not an error. 'The report was written by me' is correct grammar; 'I wrote the report' is usually stronger, especially in a cover letter.
Why does 'affect' versus 'effect' confuse so many writers?
Because 'affect' is usually the verb (to influence) and 'effect' is usually the noun (the result). The letter used 'the affect of the change' — that needed 'effect' — and it is one of the two confused-pair flags here.