Get Your Essay Graded Before You Submit
Paste or upload your essay and OneStudy grades it against a real rubric in seconds — with specific, actionable feedback on your thesis, structure, evidence, and clarity, so you fix the problems while there's still time.
Loved by 1,000,000+ students
Feedback on Any Kind of Writing
From a five-paragraph essay to a research paper, OneStudy grades it like a thoughtful teacher would.
Argumentative & Analytical Essays
Get feedback on your thesis, the strength of your argument, and how well your evidence actually supports it.
Research Papers
Check structure, citations, and clarity across longer papers, with specific notes on each section.
Application & Personal Essays
Sharpen a personal statement or supplemental essay with honest feedback on voice, focus, and impact.
Against Your Own Rubric
Paste the assignment's rubric and OneStudy grades against those exact criteria, so the feedback matches how you'll actually be marked.
From material to mastery in three steps
Add your essay
Paste your draft or upload the document, and optionally add the assignment prompt and rubric.
Get graded instantly
OneStudy scores your essay against the rubric and pinpoints exactly what's working and what isn't.
Revise and resubmit
Act on the specific suggestions, then re-grade to watch your score climb before the real deadline.
Feedback You Can Actually Act On
A grade with no explanation doesn't help. OneStudy tells you what to change and why.
Rubric-Based Scoring
Grades against standard academic expectations or the rubric you paste in, with a breakdown by criterion so you know where the points went.
Specific, Section-by-Section Feedback
Feedback points to the specific section or paragraph that needs work, not vague "improve your clarity" advice.
Structure & Argument Analysis
See whether your thesis holds, your paragraphs flow, and your evidence lands — the things that move a grade the most.
Grammar & Clarity
Catch awkward phrasing, wordiness, and grammar slips that quietly cost you marks.
Grades to Your Assignment
Paste the assignment prompt and rubric and OneStudy grades to those exact requirements, catching missing sections and formatting misses.
Ask the Tutor to Explain
Not sure why a paragraph is weak? The AI tutor breaks down the feedback and helps you rewrite it.
AI Essay Grader vs. Waiting for the Teacher
By the time a graded essay comes back, the deadline has passed. OneStudy gives you the feedback while you can still use it.
| Compare | Doing it by hand | Generic AI chatbots |  OneStudy |
|---|---|---|---|
| Feedback in seconds, not weeks | Sometimes | ||
| Grades against a rubric | Manual | ||
| Specific, section-by-section notes | If you're lucky | Generic | |
| Structure & argument analysis | Shallow | ||
| Re-grade after revising | |||
| Explains the feedback | Sometimes | ||
| Available any time |
How Students Use the Essay Grader
A dry run before the deadline
Grades a full draft, fixes the flagged weak paragraphs, and re-grades to confirm the improvement.
A personal statement that lands
Tightens voice and focus with honest feedback before sending it to admissions.
Long papers, section by section
Checks structure and citations across a research paper with targeted notes on each part.
Clarity and confidence
Gets grammar and phrasing fixes with explanations, improving writing on every draft.
AI Essay Grader — your questions, answered
OneStudy evaluates your essay against a rubric — a standard one or the specific rubric you paste in — and scores criteria like thesis, structure, evidence, and clarity, with detailed feedback on each.
Yes. Paste the assignment's rubric and the grader marks against those exact criteria, so the feedback reflects how you'll really be graded.
Argumentative and analytical essays, research papers, personal and application essays, and more — at any level from high school to graduate.
Both. You get a grade plus specific, sentence-level suggestions, and the AI tutor can explain any note and help you rewrite.
Absolutely. Revise based on the feedback and re-grade as many times as you like to watch your score improve before submitting.
Yes, you can grade essays for free. OneStudy+ unlocks higher limits and every study tool.
One upload, every study tool
OneStudy isn't one feature — it's a whole study system. Explore what else your material can become.
Fix the problems before your teacher finds them
Grade your essay free and get the feedback that turns a good draft into a great grade.
No credit card required · Free to start