# Citation Check for Quality Information.

Use our reliable source checker and AI reference finder to quickly find sources from text, essays, or research papers. A simple way for students, educators, and researchers to provide citations and evidence for their work.

99% Accuracy  
17 million Users  
1 million Educators

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## Citation Checker - Verify Sources & Bibliographies

GPTZero's AI Citation Checker automatically detects hallucinated sources and poorly supported claims in essays. Verify academic integrity with the most accurate citation verification tool for educators.

## Detect Hallucinated Citations & Fake Academic Sources

AI writing tools often generate convincing but non-existent citations. Our citation checker identifies these hallucinated references instantly, helping educators maintain academic integrity without spending time on manual verification.

## Advanced Citation Verification Technology

Get in-depth analysis highlighting specific sentences likely to contain hallucinated or incorrect citations, allowing educators to focus verification efforts on the most suspicious citations and claims rather than reviewing every source.

## Discover New Sources for Missing Citations

Get AI-powered suggestions for credible academic sources to support unsupported claims and strengthen arguments.

## Trusted by Educators.

Kristina McElheran  
Assistant Professor of Economics,  
University of Toronto  
"GPTZero’s feedback aligns well with my sense of what is going on in the writing - almost line-for-line."

Randi Weingarten  
President,  
American Federation of Teachers  
"This tool is a magnifying glass to help teachers get a closer look behind the scenes of a document, ultimately creating a better exchange of ideas that can help kids learn and get excited about school when AI is used appropriately."

Justin Curl  
J.D. Candidate,  
Harvard Law School  
"I'm a huge fan of the writing reports that let me verify my documents are human-written. The writing video, in particular, is a great way to visualize the writing process!"

## AI Text Detection and Analysis Trusted by Leading Organizations

## Built-in AI Detection for Classrooms and Workspaces

Bring the most precise AI content checker directly into the software you use every day.

## Choose a plan to upgrade

### Free
- $0  
- 10,000 words per month  
- Basic AI Scan  
- 3 Free Advanced Scans  
- 5 Free AI Highlights in Chrome Extension

### Premium
- Most Popular  
- $12.99/ month, billed annually  
- 300,000 words per month  
- Up to 300,000 words per month  
- Advanced AI Scan  
- Multilingual AI detection  
- Download AI reports  
- AI Highlights in Chrome Extension

### Professional
- $24.99/ month, billed annually  
- 500,000 words per month  
- All of Premium  
- Up to 10 million words overage  
- Scan up to 250 files at once  
- Page by page scanning  
- Enterprise grade security LMS Integration

## General FAQs about GPTZero's Source Finder

### What is GPTZero's source finder?

GPTZero source finder is to detect potentially misleading claims in text and give recommendations for sources that support or contradict those claims. Our tool allows you to find any arguments or “claims” in a document that may require more scrutiny, and then links to helpful sources to dive deeper into your analysis and provide helpful context. You can pull these into your own research, or share your results to improve someone else's.

### How do I use GPTZero's source finder?

Source finder will detect as many checkable, objective claims in your text and match those to sources from online, academic, and publicly available data coming from AI-powered search engines. You may find sources that would directly support or contradict these claims. You can cite the relevant snippet from the source, and also citations in MLA, Chicago, APA, BibTeX and IEEE.

### Does GPTZero's source finder use AI?

We use AI to detect claims and arguments and pair them with potentially relevant sources. We actively do NOT recommend AI-generated content, due to their unreliability, and filter out sources that are potentially AI-generated.

### Does GPTZero's source finder work as a fact checker?

Our tool currently does not take a stance on whether your claims or the claims in the sources cited are true “facts” or false. We only indicate whether there is online evidence that contradicts, debates, or supports a claim. We strive to only include high-quality sources from reputable online, academic, and public sources, but do not endorse the viewpoints in any specific source.

### How does GPTZero select the sources in its database?

We allow you to search for claims from a dataset of over 220M scholarly articles, preprints and real-time news using AI next-generation recommendation AI and large language models.

### What citation styles does GPTZero support?

GPTZero supports major formats including MLA, APA, Chicago, IEEE, and BibTeX, making it easy to check sources across a variety of academic and professional settings.

### Does GPTZero support multiple languages besides English?

Yes. GPTZero was trained on a diverse multilingual dataset and supports English, Spanish, French, German, and other languages. Detection is strongest in English but continues to expand across other languages.