Free Grammar Checker Corrections Labeled With the Rule Behind Them
Run an academic sentence through a grammar checker and expect more than tidied-up text back. Paste up to 250 words from an essay, a paper or an application, and errors in agreement, verb tense, articles and prepositions come back corrected, with your original wording set beside each fix and the rule that justified it.
Paste or type your text, then run the tool. Results appear below in seconds.
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Three steps to check your grammar online
Paste a paragraph
Up to 250 words from an essay, a research paper, a cover letter or an email. Long documents split cleanly into paragraph-sized sections without losing context.
Errors are resolved sentence by sentence
Agreement, tense, article and preposition errors are corrected along with any spelling or punctuation that travels with them, while your vocabulary, order and voice stay as submitted.
Check the fix list, then copy the result
Each correction names its category, quotes your original wording and states the rule in one line. Confirm nothing field-specific changed, then take the corrected paragraph.
What sits behind each correction
Every correction shown, not just applied
Instead of handing back a cleaned block of text, the tool lists each fix next to what you originally wrote, so you can see what changed before you submit anything.
Tuned to academic sentences
Field terminology, formal hedging and the long noun phrases common in research writing pass through unflagged rather than being treated as errors the way a general-purpose checker might treat them.
A rule attached to each fix
Agreement, article choice, verb form: every correction states which category it belongs to. Run the same kind of paragraph often enough and the recurring pattern starts disappearing from the first draft.
Your English convention held steady
American or British usage is detected from your own sentences and kept as the standard, with only genuine inconsistencies flagged. The convention itself is never switched without being asked.
What a grammar pass over academic writing should surface
A grammar check has three parts to its job: locate the error, correct it, and show why. Many tools stop after the second part, handing back a block of revised text with no way to see what moved. In academic writing that gap costs more than it saves, because every sentence you submit is one you are expected to defend, and a tool that rewrites quietly can turn a careful hedge into an unqualified claim or trade a technical term for something more familiar while you are not looking.
This checker keeps the third part. It reads each sentence the way a proofreader would, corrects the grammar, spelling and punctuation inside it, then reports the change as a pair: the wording you had, the wording it became, and the rule that decided the swap. Because every fix carries a category, one look at the list tells you whether your recurring weakness sits in agreement, articles or something else entirely. Run the same habit across a semester of drafts and the pattern of the recurring error starts to fade from the first version written, before any correction step ever runs.
Grammar is one layer among several mechanical checks. When commas and semicolons are the recurring trouble, the punctuation checker goes further than a grammar pass reaches, and the spell checker hunts typos while naming whether your spelling leans American or British. For graded work, the essay checker layers comments on structure, clarity and tone over this same mechanical sweep.
One thing a grammar pass cannot reach is pacing. A draft can be free of every agreement and article error and still read as machine-written, because rhythm and word choice carry that signal, not correctness alone. That is the job of the TextPulse humanizer, which reworks phrasing and rhythm across a full draft in tracked changes, each edit itemized the way this checker itemizes its own.
Sample paragraph: four corrections traced to their rules
A paragraph built from the agreement slips that show up in methods sections and survey write-ups most often, corrected in the tracked-changes view.
The findings of this survey indicates that motivation among first-year students decline over the semester. Each of the participants were told that there responses would stay anonymous.
The findings of this survey indicatesindicate that motivation among first-year students declinedeclines over the semester. Each of the participants werewas told that theretheir responses would stay anonymous.
- Grammar"indicates" becomes "indicate"The head noun controlling the verb is findings, a plural, even though the singular survey sits directly in front of the verb.
- Grammar"decline" becomes "declines"Motivation is the subject and it is singular; the plural students beside the verb does not change that.
- Grammar"were" becomes "was"Each is grammatically singular in formal register, regardless of how many participants it refers to.
- Spelling"there" becomes "their"The sentence calls for the possessive form; there marks location, not ownership.
Three of the four corrections are agreement errors, which is the usual ratio: academic sentences stack noun phrases between subject and verb, and the noun sitting closest to the verb pulls the agreement toward itself. The checker works backward from each verb to its actual head noun before deciding, and names that reasoning in the fix list.
Who reaches for this grammar checker
Students finishing a draft
Run the paragraph before it is due, and carry the rule behind each fix into the next assignment instead of just the correction.
Researchers preparing a submission
A pass over abstracts, cover letters and reviewer responses that leaves field terminology alone instead of flagging it as error.
Multilingual and ESL writers
Articles, prepositions and agreement are the errors a second language produces most often, and each correction states its rule in plain terms.
Anyone writing under review
Scholarship essays, job applications and formal email read better with clean mechanics and a voice that still sounds like its author.
Grammar is only one layer of a finished draft.
Phrasing and rhythm are the layer a reader notices next.
Correct grammar is the baseline a reader expects and rarely praises. The TextPulse humanizer works through phrasing and rhythm across a complete draft in tracked changes, with citations left untouched and every edit yours to accept.