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Free Online Citation Checker

Paste one citation or suspicious reference and compare it with current academic records. Review identifier, title, author, and year differences before you reuse or submit it.

Checking a whole reference list? Run every entry through the Reference Checker

No signup · No credit card · Works in your browser

Scholarly lookup coverage

Check one citation against real source records

CiteMe searches scholarly source records and compares the fields available in them. Its strongest signal is whether a source record exists; a match does not prove that every cited field is correct.

59.5k+ references checked in the last 30 days

CrossRefOpenAlexPubMedSemantic ScholarGoogle BooksEurope PMC
See source coverageRead the fabrication-rate dataVerify a full bibliographyGenerate from source metadata

What to do next

Find Real SourcesAudit a Whole BibliographyIn-Text Citation Checker

How it works

1

Step 1

Paste one citation

Copy a single reference from Word, Google Docs, ChatGPT, or any bibliography tool. Use it when one citation looks suspicious or you want to verify a source before reusing it.

2

Step 2

Run the citation check

CiteMe searches OpenAlex, CrossRef, Semantic Scholar, PubMed, and Google Books to verify the citation against real publication records.

3

Step 3

Review the match and issues

See whether the citation is verified, missing fields, mismatched, or potentially hallucinated. If you need to check a full reference list, continue to the Reference Checker.

What the citation checker can establish

The checker is built to answer one question well: is there a real source behind this citation. It is strong at catching fabricated references and weaker at catching wrong details inside a source that does exist. The numbers below come from a frozen 369-reference benchmark, not from estimates.

Whether the source exists at all

The core check: does a scholarly record appear behind the citation. In our frozen 369-reference benchmark, no fabricated citation was classified as a source record found.

Hallucination risk

Raises a conservative review flag only when independent risk signals remain after a source cannot be confirmed. A missing match by itself is never proof that a citation was fabricated.

DOI resolution

Checks whether the DOI resolves to a real record. A DOI that resolves to a different work than the one you pasted is harder to catch and often passes.

Match evidence and coverage

Looks for records in indexes including CrossRef, OpenAlex, PubMed, Semantic Scholar, and Google Books. Grey literature — theses, institutional reports, non-indexed regional journals — can be real even when no match appears here.

What it does NOT reliably catch yet

Field-level errors in a source that genuinely exists. A wrong journal name, volume, page range, or year often still returns as matched. Verify those by hand before you submit.

Citation Checker vs Reference Checker vs AI Reference Verifier

These tools share verification logic, but they solve different jobs. Choose by the amount of material you need to check and where the citation came from.

One citation

Citation Checker

Use it to check one suspicious citation, one copied reference, or one AI-generated source before you reuse it.

Full bibliography

Reference Checker

Use it when you have a complete reference list and want every entry checked for a matching source record in one pass.

AI source audit

AI Reference Verifier

Use it when the main risk is references produced by ChatGPT, Gemini, Claude, or another AI assistant.

Example citation checker outputs

A real check does more than say whether the citation is formatted correctly. Its strongest signal is whether the source exists at all — the case where a fabricated reference is caught before you submit it.

Source record found

DOI and bibliographic fields align

Example input

Harris, C. R., Millman, K. J., van der Walt, S. J., et al. (2020). Array programming with NumPy. Nature, 585, 357-362. https://doi.org/10.1038/s41586-020-2649-2

Checker output

The DOI resolves and the title, author set, journal, year, and pages line up with the source record.

Partial match

Real source, wrong field

Example input

Harris, C. R., Millman, K. J., van der Walt, S. J., et al. (2019). Array programming with NumPy. Nature, 585, 357-362. https://doi.org/10.1038/s41586-020-2649-2

Checker output

When the checker catches it, a wrong year downgrades the status like this. Field-level errors are the hardest case, so treat a clean result on an existing source as "not disproven" rather than "confirmed correct".

No match + risk signals

No scholarly record found

Example input

Smith, J. (2024). Neural pathways in classroom memory. Journal of Applied Learning, 18(2), 44-61. https://doi.org/10.5555/fake.2024.118

Checker output

The DOI does not resolve and no matching title-author record appears in the checked databases.

By CiteMe Editorial Team·

When a citation checker is the right tool

Use Citation Checker when the problem is one suspicious reference, not the entire bibliography. Typical cases: a citation pasted from ChatGPT, a reference copied from an old draft, a DOI that looks wrong, or a source that feels plausible but is hard to find again. Checking one citation at a time is faster when you already know which entry is risky.

What CiteMe verifies inside one citation

CiteMe tries to match the citation against real scholarly metadata from OpenAlex, CrossRef, Semantic Scholar, PubMed, and Google Books. It looks for title similarity, author overlap, publication year agreement, DOI validity, and journal or publisher consistency. This is useful for spotting made-up references, partial metadata, and formatting that hides a deeper source error.

What to do when a citation fails verification

If the citation is close to a real source, fix the metadata first: DOI, year, author order, or source title. If the entry came from an AI tool, regenerate it from a DOI, URL, title, or ISBN instead of editing blindly. If you need to audit an entire list after fixing one entry, move to the full Reference Checker and rerun the bibliography in one pass.

Supported citation styles

APAMLAChicagoHarvardIEEEVancouverABNTAMAASABluebookCSEOSCOLATurabianACSMHRAAPA 6thNaturePLOSScienceCellLancetAIPRSCAPSAAAAAGLCMcGillNP 405ISO 690ISO 690 (DE)ISO 690 (FR)ISO 690 (ES)Chicago NotesABNT Numérico

Need it in a specific citation style?

Format the result in the style your paper requires — APA, MLA, Harvard, Vancouver, Chicago, or IEEE.

APA Citation Generator

Author-date format for psychology, social sciences, and education.

MLA Citation Generator

Works Cited format for humanities and literature.

Harvard Referencing Generator

Author-date common in UK and Australian universities.

Vancouver Citation Generator

Numbered references for medicine and biomedical research.

Chicago Citation Generator

Notes-bibliography or author-date for history and the arts.

IEEE Citation Generator

Bracketed numbers for engineering and computer science.

Need to check a full bibliography?

Reference Checker for full bibliographiesAudit in-text citations in a full paperBuild a bibliography from source recordsAI Reference VerifierReformat citationsRegenerate from DOI

Learn more about verifying references

How to check if a citation is realHow to verify a DOIWhat an unverified reference meansCitation checker vs reference checker

This tool in other languages

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Also try

Citation Generator

Search by title, DOI, ISBN, URL, or author name

Reference Checker

Verify your bibliography against academic databases

In-Text Citation Checker

Paste your full paper and cross-check in-text citations against the reference list

Frequently asked questions

What does the citation checker verify?
CiteMe checks one citation at a time against current academic indexes and registries. It reports whether a likely record was found and shows differences in author names, title, year, DOI, and journal. A found record does not guarantee every field is correct.
When should I use citation checker instead of reference checker?
Use Citation Checker when you want to inspect one suspicious citation or a reference copied from another document. Use Reference Checker when you want to scan a full bibliography in one pass.
Can it prove that a reference was fabricated?
No. CiteMe can report that no matching record was found and highlight identifier or metadata inconsistencies. New work, regional sources, repositories, and metadata errors can also be absent from an index, so the result still requires manual review.
Is the citation checker free?
Yes. You can use the citation checker for free within the monthly checker quota. If you need to verify multiple references at once, move to the full Reference Checker workflow.
Does it work for citations in any style (APA, MLA, Chicago)?
Yes. The checker compares source fields rather than judging citation punctuation, so it works with APA, MLA, Chicago, Harvard, Vancouver, and other styles. A matched record can then be reformatted.
What does “no match found” mean?
It means CiteMe did not locate a sufficiently similar record in the sources consulted for that run. The source may be new, niche, regional, unindexed, or written with incorrect metadata. Re-check the DOI and title, then review it manually.

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