PDFSimpli

Free Plagiarism Detector

Plagiarism detector for copied passages Plagiarism Checker

Detect copied or closely paraphrased text by scanning your document against an extensive source index

Index spans academic journals plus general web publishing

Identifies partial matches that simple search engines miss

Built for writers who need dependable, repeatable results

24/7 multilingual phone, chat and email support | +1-844-898-1076

Index spans academic journals plus general web publishing

Identifies partial matches that simple search engines miss

Built for writers who need dependable, repeatable results

24/7 multilingual phone, chat and email support | +1-844-898-1076

Detect plagiarism with AI in three simple steps

Detect copied or closely paraphrased text by scanning your document against an extensive source index

Submit work

Upload your document or paste your text into the plagiarism scanner

Deep scan

Our AI compares your work against billions of web pages and academic databases

View report

Receive a detailed authenticity report with highlighted matches and source links

Advanced AI plagiarism detector

Detect copied or closely paraphrased text by scanning your document against an extensive source index

Detect copied text across a billions-page database of content
Scan content quickly and identify plagiarism issues instantly
Run comprehensive authentication checks right in your browser

Originality and detailed similarity report

Detect copied or closely paraphrased text by scanning your document against an extensive source index

Receive a clean transparent digital audit trail showing sources
Show originality levels with guide edits to improve uniqueness
Visualize matching text clearly with color-coded highlighting

Translate with AI

Advanced AI plagiarism detector

Detect copied or closely paraphrased text by scanning your document against an extensive source index

Detect copied text across a billions-page database of content
Scan content quickly and identify plagiarism issues instantly
Run comprehensive authentication checks right in your browser

Originality and detailed similarity report

Detect copied or closely paraphrased text by scanning your document against an extensive source index

Receive a clean transparent digital audit trail showing sources
Show originality levels with guide edits to improve uniqueness
Visualize matching text clearly with color-coded highlighting

Here's why people trust us

An AI-powered detection suite with everything you need

Scan against an index of web content, academic journals, and books

Detect word-for-word matches, paraphrased, and structural similarities

Get direct links to the original content for proper citation and verification

Visualize which parts of your doc need review with color-coded highlighting

Documents remain private and are never added to public databases

Meet the highest standards of original research and professional publishing

Frequently asked questions

Detect copied or closely paraphrased text by scanning your document against an extensive source index

What databases does the Plagiarism Checker search?

Our tool scans billions of web pages, academic journals, and archived documents to ensure comprehensive coverage.

Does it provide links to the original sources?

Yes, if a match is found, we provide a direct link to the source so you can verify and cite it correctly.

Is my uploaded document added to a public database?

No. We prioritize your privacy; your work is never shared or stored in a way that others can see it.

Can it detect "paraphrased" plagiarism?

Our AI looks for structural similarities and ideas, not just exact word-for-word matches, to catch sophisticated plagiarism.

Is this tool suitable for students and teachers?

Yes, it is designed to meet the rigorous standards of both academic institutions and professional publishers.

See All FAQs

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All you need to
know about PDFs

How AI detection protects your reputation

Instantly detect AI generated text and images online to protect your brand and content credibility

The plagiarism checker that catches what others miss

Check any document for plagiarism instantly to protect business and academic integrity and originality

Building a fair AI detection policy that actually

Learn how to use AI detection tools effectively for your education or business workflow rules

Side-by-side comparison to catch every change

Compare two documents instantly and highlight every difference so nothing slips through

Learn how to WorkSmart with us

Building a fair AI

detection policy that actually

Learn how to use AI detection tools effectively for your education or business workflow rules

Side-by-side comparison to catch every change

Compare two documents instantly and highlight every difference so nothing slips through

How AI detection

protects your reputation

Instantly detect AI generated text and images online to protect your brand and content credibility

The plagiarism checker that catches what others miss

Check any document for plagiarism instantly to protect business and academic integrity and originality

Plagiarism detector for copied passages plagiarism now

Detect copied or closely paraphrased text by scanning your document against an extensive source index

Plagiarism detector for copied passages Plagiarism Checker

Detect plagiarism with AI in three simple steps

Advanced AI plagiarism detector

Originality and detailed similarity report

Translate with AI

Advanced AI plagiarism detector

Originality and detailed similarity report

Here's why people trust us

All you need to know about PDFs

All you need to
know about PDFs