Duplichecker
Free-to-start plagiarism checker with paraphrasing, grammar, AI detection, and reverse image search, plus paid higher-volume plans.
What it does
Duplichecker is an online content-integrity suite best known for its free plagiarism checker, which compares text against many sources and reports a similarity percentage. It also bundles a paraphrasing tool, grammar checker, AI-content detection, and reverse image search, supports multiple file formats and languages, and sells paid plans for larger word and search volumes.
Core features
Plagiarism detection with percentage reports
Paraphrasing and grammar tools
AI-content detection
Reverse image and face search
Multiple file formats and languages
Deep and academic scan modes (paid)
Best for
→Checking essays and articles for plagiarism
→Rewriting content to improve originality
→Detecting AI-generated text
→Verifying content across languages
Pricing
Basic
$19.99/mo
Basic X
$49.99/mo