PaperRater
by Paper Rater
Free cloud-based plagiarism checker and grammar proofreader for students
Overview
PaperRater is a free online plagiarism checker and grammar proofreading tool used by students and educators across 140+ countries. It compares submitted text against 10 billion-plus documents from web and print sources to compute an Originality Score, while its cloud-based grammar engine flags spelling, contextual, and stylistic errors using machine learning. The browser tool requires no signup or download, and an optional premium plan offers higher speed and accuracy for power users.
Key Features
6 capabilities across the Plagiarism Checker workflow.
10B+ Document Index
Cross-checks submissions against billions of web pages, journals, and print sources for matches.
Originality Score
Returns a percentage score showing how much of the paper is original versus matched content.
Grammar & Spell Check
Patented engine flags grammar, spelling, and stylistic issues using contextual machine learning.
Vocabulary Builder
Suggests stronger word choices and highlights overused phrases to improve writing quality.
Automated Essay Scoring
Grades essay quality on syntax, structure, and readability for instant student feedback.
No Signup Needed
Paste text directly into the browser tool without registration, login, or software download.
Pricing Plans
All prices in INR. Contact vendor for enterprise & annual discounts.
Free
flat · billed monthly
- Plagiarism check
- Grammar check
- Originality score
- No signup
Premium
flat · custom billing
- Higher speed
- Higher accuracy
- Larger document size