AI Tools: Free AI Plagiarism Checker

EasyBib's plagiarism checker scans your papers against billions of sources, delivering a clear plagiarism score and highlighting potential matches to help prevent accidental plagiarism. It also offers free grammar and spelling checks, plus citation generation in MLA, APA, Chicago, and thousands more styles for seamless academic writing. Ideal for students and casual writers seeking quick, user-friendly tools to ensure originality and polish their work.

Copyscape is the world's most trusted plagiarism checker, scanning the web for exact copies of your content to protect copyrights and SEO integrity. It provides instant web scans, automated monitoring via Copysentry, free deterrent banners, and checks for AI-generated text matches online, trusted for over 20 years by media giants like Time, NBC, and partners like Jasper. Ideal for content marketers, freelance writers, agencies, and site owners seeking quick, reliable duplicate detection before publishing or to combat content theft.

Trinka AI Plagiarism Checker provides advanced plagiarism detection scanning over 190 million paid scholarly articles, 200 million open-access papers, and 99 billion web pages, ensuring thorough originality checks for academic and technical documents. It features Standard and Advanced modes with similarity scores, highlighted matches, top source listings, and downloadable PDF reports, while supporting .doc/.docx and PDF uploads. Trusted by institutions like MIT, Stanford, and Harvard, it's essential for students, researchers, and educators prioritizing academic integrity and data privacy through no permanent storage and confidential plans.

PlagiarismSearch.com is a powerful online plagiarism and AI content detector that scans against over 14 billion web pages, 500 million texts, and 25,000 journals with up to 99% accuracy for plagiarism and 98% for AI-generated content. It supports diverse file formats like PDFs, docs, images, audio, and video up to 24MB, delivering detailed reports, grammar checks, and readability analysis in minutes. Ideal for students, educators, writers, and professionals who need reliable originality verification through an intuitive interface and integrations such as Google Docs, Moodle, and API.

iThenticate is a premier plagiarism detection tool trusted by publishers, researchers, and academic institutions to screen high-stakes documents for originality before publication. It leverages a vast database of journals, articles, and web content to provide detailed similarity reports, helping maintain scholarly integrity and detect potential misconduct. With enterprise features like AI writing detection and seamless integrations, it's invaluable for organizations ensuring research quality, though individual users should note the premium pricing.

Paraphraser.io Plagiarism Checker is a free online tool that instantly scans text up to 1,000 words for plagiarism without requiring sign-up, supporting inputs like pasted text, files, PDFs, and URLs in over 20 languages. It uses deep web search to detect matches, including paraphrased content, delivering detailed reports with similarity percentages, highlighted sections, and source links while ensuring complete privacy by not storing user data. Ideal for students, writers, and content creators who need quick, hassle-free originality checks to maintain integrity in their work.

Plagramme is a comprehensive online plagiarism checker and AI detector supporting 129 languages, perfect for maintaining academic integrity worldwide. It scans documents against a vast database of over 80 million scholarly articles and uses real-time web searches to detect copy-paste, paraphrasing, and even recently published content. With free tiers for students and verified educators, color-coded highlighting in reports, and strict privacy measures ensuring files aren't shared, it's invaluable for educators, students, and multilingual users seeking reliable originality verification.

Accurate AI Detection / Plagiarism Checking / Fact Checking Aid - From $12.95/month

Accurate Plagiarism Detection / AI Content Detection - From $5.99/month

Free 500 words plagiarism check, 250 words AI detection / Plagiarism Checker / AI Detector / AI-powered Paraphrasing - From $8.80/month for 100,000 words

Free 300 words daily / Plagiarism check / AI detection - From $22.95/month

10000 characters free / Paraphrasing / Paragraph Generation / Plagiarism Checks - From $4.99/month