AI Citation Verification
AI Citation Checker
Verify AI-generated references from ChatGPT, Claude, Gemini, and other LLMs against CrossRef, PubMed, arXiv, and OpenAlex typically within seconds. Catch fabricated citations before submission.
What an AI citation checker actually does
Large language models produce citations that follow the visual grammar of academic references — author names, publication years, journal titles, DOI-shaped strings — without any mechanism to confirm the cited paper exists. A citation generated by ChatGPT may contain real authors attached to a paper they never wrote, a plausible journal name in a field where that journal does not publish, or a DOI string that resolves to nothing.
Citely's AI citation checker treats every reference as a claim to be verified. For each citation, it attempts DOI resolution against CrossRef's 160+ million records, cross-references title and author metadata across PubMed and OpenAlex, and validates publication year and journal name against the authoritative record. A citation is marked as verified only when an independent source confirms it.
This is the opposite approach of asking an LLM "is this citation real?" — which is exactly the check that fails, because the model that invented the hallucination cannot reliably detect it.
How it works
Paste text or reference list
Paste a paragraph with inline citations, a bibliography, or an entire draft. Citely extracts each citation automatically — no manual reformatting.
Parallel database verification
Each citation runs through DOI resolution, title matching, and author cross-check across CrossRef, PubMed, arXiv, and OpenAlex in parallel — typically within seconds for a full reference list.
Get a verified report
Each reference is flagged as verified, partial match, or fabricated, with the authoritative record shown side-by-side. Export or fix citations in place before submission.
Works across every major AI writing tool
Citely is tool-agnostic — it verifies citations against authoritative databases regardless of which AI produced them. No integration or API key required.
ChatGPT (GPT-4o, GPT-5, GPT-4)
Chimera citations, wrong publication years, fabricated DOI strings
Claude (3.5 Sonnet, Opus)
Real authors attributed to papers they didn't write
Google Gemini
Plausible journal names that don't publish in the claimed field
Perplexity
Citation drift — source cited differs from source linked
Microsoft Copilot
Pre-2021 papers cited with modern authors
DeepSeek, Kimi, Doubao, Qwen
Mixed Chinese-English citation cases with locale metadata errors
When to run an AI citation check
Before essay or term paper submission
Any section drafted or outlined with AI assistance should have its citations verified before it counts against you. A single fabricated reference is treated as academic misconduct at many institutions, even when unintentional.
Before thesis or dissertation defense
Committee members routinely spot-check citations during defense. A fabricated reference discovered at this stage can delay graduation by an entire semester.
Before manuscript submission to a peer-reviewed journal
Editors at top venues increasingly use citation-verification tools during screening. Fabricated references are a common trigger for desk rejection regardless of paper quality.
During peer review or editorial screening
If you review papers or screen submissions, running the reference list through a citation checker takes minutes and catches AI-assisted drafts that might otherwise pass review.
When cleaning up an older draft
Drafts from 2023 onward may contain LLM-assisted sections. Running a verification pass confirms the bibliography before you re-use the work.
Frequently asked questions
What is an AI citation checker?
An AI citation checker is a tool that verifies whether citations produced by AI writing assistants — such as ChatGPT, Claude, Gemini, or Perplexity — correspond to real, published academic sources. It cross-references claimed metadata (DOI, title, author, year, journal) against authoritative databases like CrossRef, PubMed, arXiv, and OpenAlex to flag fabricated, mismatched, or incomplete references.
How accurate is Citely's AI citation checker?
Citely flags fabricated or metadata-mismatched citations by attempting DOI resolution against CrossRef and title-author matching across multiple academic databases. Because verification is database-driven rather than probabilistic, a citation is marked as verified only when an authoritative record confirms it — which avoids the false-confidence problem inherent to LLM-only self-checks. Coverage depends on each citation's presence in public academic databases.
Which AI writing tools does Citely support?
Citely is tool-agnostic. It verifies citations regardless of the source — ChatGPT (all versions including GPT-4o and GPT-5), Claude, Gemini, Perplexity, Copilot, DeepSeek, Kimi, and any other LLM. Paste the text or reference list, and Citely verifies the citations independently of how they were generated.
Can Citely detect AI-hallucinated citations that look plausible?
Yes. Plausibility is exactly the problem Citely solves. A fabricated citation with a real-looking DOI format, a real-sounding journal name, and plausible author names will pass visual inspection but fail DOI resolution. Citely performs the actual resolution — so a fake citation that would fool a human reviewer is flagged automatically.
Is verification private — can I check sensitive manuscript drafts?
Submitted text is processed for citation verification. See Citely's privacy policy for full details on data handling, retention, and third-party processors used during verification against public academic databases.
How does this differ from a citation generator like Zotero or Mendeley?
Citation generators format references you already know are real. Citely does the opposite: it checks whether references are real in the first place. Use a reference manager to format; use Citely to verify. They complement each other — especially when any portion of your draft was assisted by an AI writing tool.
Verify your citations before submission
Paste a paragraph or reference list. Get a verified report in seconds. Catch fabricated AI citations before they cost you.
Try Citation Checker