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Standard Correction: Balanced grammar, spelling, punctuation and light style polish for everyday writing.
Fix grammar, spelling, punctuation, style and clarity, score your writing on seven dimensions, rewrite and retune the tone, and import or export across eight formats — all powered by a transparent, rule-based engine that never uploads your text.
Catches misspellings and missing apostrophes, confused words (its/it’s, your/you’re, affect/effect, to/too, loose/lose, then/than, could of), subject-verb agreement, verb tense, double negatives, article and capitalization errors, spacing, duplicate words and punctuation mistakes — each with a one-click fix.
Flags wordy phrases, filler, passive voice, overly long sentences and weak word choices, then suggests tighter, clearer, more precise alternatives that keep your meaning intact.
Live grammar, quality, readability, clarity, vocabulary, engagement and professionalism scores — plus passive-voice percentage and repeated-word detection — update as you type.
Basic, Standard and Advanced plus Professional, Academic, Business, Technical, Legal, Marketing, Creative, SEO, Email, Resume, Cover-letter and Social — each tuned to that kind of writing.
One-click Simplify, Shorten, Expand, Humanize, Improve clarity, Professional, Fluency, Readability and Remove-repetition, plus 14 tone presets from Formal to Friendly to Confident.
Import TXT, DOC, DOCX, PDF, RTF, ODT, Markdown and HTML, or analyse any web page by URL. Export corrected text and a full report as TXT, DOCX, PDF, HTML, Markdown or JSON.
Detects English, Hindi, Spanish, French, German, Portuguese, Italian, Dutch, Arabic, Chinese, Japanese, Korean and Russian, and targets correction at the language you are writing in.
Checking runs entirely in your browser with a transparent, rule-based engine — your text is never uploaded, logged or stored, and it keeps working offline once the page has loaded.
Type or paste into the editor, upload a TXT, DOC, DOCX, PDF, RTF, ODT, Markdown or HTML file, or paste a URL to pull in an article or blog post. Live counters track characters, words, sentences, paragraphs and reading time as you write.
Choose a correction mode — Basic, Standard, Advanced, Academic, Business, Technical, Marketing, SEO, Email, Resume and more — set a target tone, select your language (or let auto-detection pick it) and choose US or UK English. The corrector tailors its suggestions to the writing you are doing. Need to fix many texts? Switch the input to Bulk mode.
Every issue is highlighted in context and grouped by category — grammar, spelling, punctuation, style, clarity, vocabulary and consistency — each with a plain-English explanation. Accept or reject corrections one at a time, or apply them all at once.
See live scores for grammar, readability, clarity, vocabulary, engagement and professionalism, run one-click rewrites (simplify, shorten, humanize, professional and more), then copy or export the result as TXT, DOCX, PDF, HTML, Markdown or JSON — or download a full report.
An AI grammar corrector is a writing assistant that reads your text the way an editor would — checking grammar, spelling, punctuation, style and clarity — then explains each issue and suggests a fix. Instead of underlining a word and leaving you to guess, it tells you why “a apple” should be “an apple”, why “the report was written by the team” reads better in the active voice, and which long sentence is hurting your readability.
This tool combines a transparent, rule-based correction engine with writing-quality analytics. It detects errors across seven categories, scores your writing on seven dimensions, offers one-click rewrites and tone changes, and works in your browser so your words never leave your device. It is built for students, professionals, marketers, researchers and content creators who want fast, private, professional-grade proofreading without a subscription.
The corrector tokenises your text into characters, words, sentences and paragraphs, then runs dozens of detectors over it. Spelling detectors compare words against a dictionary of common misspellings and confusables; grammar detectors check articles, subject-verb cues, pronoun capitalization, repeated words and sentence-initial capitals; punctuation detectors handle spacing, duplicate marks and missing spaces; and style detectors find wordy phrases, filler and passive constructions.
Each finding becomes a suggestion with a start and end position, the original text, a proposed replacement, a category and a plain-English explanation. Overlapping suggestions are resolved so you never see conflicting fixes, and harder errors take priority over softer stylistic ones. You decide what to apply — accept a single fix, reject it, or apply everything at once and keep editing.
On top of correction, the engine measures readability with the Flesch formula, estimates clarity from passive voice and sentence length, gauges vocabulary from lexical diversity, and rates engagement and professionalism from sentence variety, contractions and tone markers. Those numbers give you an objective read on whether an edit actually improved the writing.
Every suggestion is tagged with a category and a severity so you can fix the most damaging issues first.
| Category | Example | Severity | What it covers |
|---|---|---|---|
| Spelling | recieve → receive | Critical | Misspelled words plus 100+ common typos and missing-apostrophe contractions (dont → don’t). |
| Grammar | he don’t → he doesn’t | Critical | Articles, subject-verb agreement, verb tense (have went → gone), pronouns, double negatives, confusables (your/you’re, affect/effect, to/too, loose/lose) and capitalization. |
| Punctuation | word , word → word, word | Warning | Commas, spacing, apostrophes, quotes, brackets and repeated marks. |
| Style | free gift → gift | Suggestion | Wordy phrases, filler, redundancy/pleonasms and passive constructions. |
| Clarity | very long sentences | Suggestion | Overly long sentences and ambiguous phrasing. |
| Vocabulary | good → excellent | Suggestion | Weak or imprecise word choices. |
| Consistency | color / colour mix | Warning | Mixed US/UK spelling (with a target-variant mode), casing and quote styles. |
Clean writing is read more, trusted more and acted on more. A single typo in a cover letter, a run-on sentence in a proposal or a misplaced apostrophe in marketing copy can quietly undermine an otherwise strong message. Correct grammar signals care and competence; clear structure helps a busy reader grasp your point on the first pass.
Beyond avoiding mistakes, improving clarity, conciseness and tone measurably raises engagement. Shorter sentences and active voice lift readability scores; precise vocabulary makes arguments land; a consistent, appropriate tone builds rapport. Using the scores and insights here, you can see exactly which changes move the needle and learn habits that make your next draft better from the start.
Correction here is continuous, not batch. Every keystroke re-runs the full detector set, highlights issues in place and updates the seven writing scores, so you fix problems as you write instead of at the end. Drafts autosave to your browser, the undo/redo history is unlimited within a session, and a Recent Documents history lets you jump back to anything you corrected earlier.
For long-form work — essays, theses, reports, documentation and even book chapters — the editor handles up to 100,000 characters while staying responsive, and analysis runs across the whole document so multi-section context is preserved. When you have many shorter pieces to fix, Bulk mode corrects each block independently and exports the batch, and document import (DOCX, PDF, ODT, RTF, HTML and more) brings large files straight into the editor.
Proofread essays, assignments, theses and papers with a formal academic tone and consistency checks — privately, before you submit.
Polish emails, reports, proposals and documentation into concise, confident, executive-ready writing in seconds.
Tighten marketing copy, blog posts and social captions; cut filler, vary repetition and keep a punchy, on-brand voice.
Keep documentation clear, consistent and unambiguous, with defined terms and short, direct sentences.
Sharpen resumes and cover letters with action verbs, quantified results and a sincere, professional tone.
Write in 13 languages with auto-detection, and correct English drafts to a natural, fluent standard.
For essays, research papers, theses, dissertations, reports and journal articles, switch to Academic mode for a formal tone, full words instead of contractions and precise, evidence-led sentences. The corrector flags casual vocabulary, hedging and inconsistent spelling (US vs UK), and the readability and clarity scores help you keep dense arguments understandable.
Because everything runs locally, it is safe for unpublished research and confidential coursework — nothing is uploaded to a server. Pair it with the readability and word-count tools to meet length requirements and maintain a scholarly, consistent voice across long documents.
Emails, reports, proposals, presentations, documentation and corporate communication all benefit from Business and Professional modes, which favour concise, confident, executive-friendly wording. The corrector cuts filler and wordy phrases, expands or contracts language to match your tone, and surfaces passive voice so your call to action stays direct.
Resume and Cover-letter modes go further, nudging you toward action verbs, quantified results and a sincere, professional register. Export the polished version straight to DOCX or PDF and drop it into your workflow.
SEO mode optimises for the way both readers and search engines consume content: scannable sentences, natural keyword usage, clear structure and a comfortable reading level. The corrector highlights overlong sentences and repeated words that hurt readability, while the engagement and clarity scores tell you whether a section is easy to skim.
Use the repeated-word report to diversify phrasing and avoid keyword stuffing, and the readability score to keep content accessible to a broad audience — both of which support stronger on-page performance without sacrificing quality.
Plain, inclusive language reaches more people. The Simplify and Readability rewrites swap complex words for everyday ones and trim wordy phrasing, lowering the reading level so content works for second-language readers, screen-reader users and anyone skimming on a phone.
Clarity scoring and passive-voice detection help you write directly and unambiguously, while consistency checks catch mixed spelling and quote styles that make text feel uneven. The result is writing that is easier to read for everyone, not just specialists.
Great proofreading is layered. Start with mechanics — run Standard mode to clear spelling, grammar and punctuation errors, then accept the fixes you agree with and reject anything that changes your meaning. Next, switch to Advanced to surface wordiness, passive voice and weak vocabulary, and use the one-click rewrites to tighten the prose. Finish with a read for tone, using the tone presets to match the audience.
Two habits make the biggest difference: read the corrected version once on its own, top to bottom, to catch anything the rules missed; and watch the scores rather than just the error count — a draft can be error-free yet score low on readability or clarity. The repeated-words report and passive-voice percentage are quick, objective signals that you have something left to improve. When the Quality score plateaus and the suggestion list is empty, the draft is genuinely ready.
Tools like Grammarly, QuillBot, LanguageTool, ProWritingAid, Hemingway Editor and Ginger popularised real-time grammar checking, writing scores and tone suggestions. This corrector covers that same everyday workflow — grammar, spelling, punctuation, style and clarity correction, tone and clarity rewrites, readability scoring, document import and multi-format export — with no account, no word limits and no suggestions hidden behind a paywall.
The deliberate difference is privacy and transparency. The engine is rule-based and runs entirely in your browser, so your text is never uploaded, and every suggestion comes with a plain-English explanation of why it is recommended. That trade-off means it focuses on correctness, clarity and style rather than features that require sending your writing to a server, such as plagiarism detection or AI-content detection. For confidential or offline writing, an in-browser, no-sign-up assistant is often the better fit.