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Citation Checker
.pdf, .doc , .docx
Up to 20 citations are verified per check.
Verification results will appear here after you run a check.
Trusted by 10k+ Universities • 50k+ Businesses • 100+ Countries
Verify Citations Against Databases
Citation Checker applies AI-powered analysis and retrieval algorithms to cross-verify citations against real academic records. It generates a confidence score for every citation using a proprietary citation verification scoring model. CudekAI verifies hundreds of citations per batch with single-click speed for accurate results at scale.
CONFIDENCE SCORE PER CITATION
Smith et al. (2021), Nature
Verified · 96%
Chen & Kumar (2019), IEEE Access
Verified · 88%
Lopez (2020), J. Appl. Psych.
Partial · 62%
Anderson (2022), unknown journal
Unverified · 14%
Checked against 250M+ works
AI HALLUCINATION PATTERNS FLAGGED
Non-existent DOI
FLAGGED
Invented author names
FLAGGED
Fake journal article
FLAGGED
Mismatched metadata
FLAGGED
Catch Fake Citations
Citation Checker detects fake citations and AI-hallucinated references produced by AI tools like ChatGPT. It flags hallucination patterns, including non-existent DOIs, invented author names, fake journal articles, and mismatched metadata. CudekAI removes bogus references and AI-hallucinated sources before any paper reaches submission.
Replace Fakes With Sources
Citation Checker finds verified substitutes for every unverified reference and links directly to confirmed academic sources. It supplies open-access links, publisher links, and DOI links, so replacement requires no manual searching. CudekAI connects each flagged entry to a real, verified source with a high-match confidence score.
UNVERIFIED REFERENCE
Anderson, T. (2022). Neural approaches to memory. Journal of Cognitive Advances, 18(4).
VERIFIED REPLACEMENT · 97% MATCH
Baddeley, A. (2020). Working memory: Theories, models, and controversies.
doi.org/10.1146/annurev-psych-120710-100422
Search Trusted Academic Sources
Citation Checker cross-references every citation against 250M+ works across 10+ authoritative academic databases. It draws on OpenAlex, CrossRef, PubMed, Semantic Scholar, Google Scholar, Google Books, Europe PMC, Wiley, Springer, arXiv, Elsevier, IEEE, CORE, ResearchGate, BMC, and Cambridge. CudekAI delivers verified scholarly metadata across every indexed source for comprehensive citation coverage.
Explore All Checker Features
Match Author And Year
Verifies author names, author order, publication year, journal titles, volume, issue, and page numbers against real source records. Surfaces year mismatches, author discrepancies, and publisher inconsistencies, so every metadata field aligns with the original publication.
Validate DOIs And Identifiers
Checks DOI validity, doi.org links, ISBN-10, ISBN-13, PMID, arXiv ID, and article URLs against live academic records. Catches non-existent DOIs, wrong identifiers, and broken links before final submission.
Flag Missing Metadata
Detects missing authors, partial metadata, mismatched fields, misspelled titles, stylistic errors, and omissions across every reference. Flags each issue individually so metadata errors are corrected before submission.
Check Citation Styles
Supports 40+ referencing styles, including APA 7th Edition, MLA 9th Edition, Chicago, Harvard, IEEE, Vancouver, AMA, CSE, OSCOLA, Turabian, Nature, PLOS, Lancet, McGill, ISO 690, and ABNT. Verifies the underlying source across any style, so formatting never blocks accuracy checking.
Import Reference Files
Accepts BibTeX, BibLaTeX, RIS, CSL-JSON, MEDLINE, .nbib, .bib, .ris, TXT, Word .docx, and EndNote XML file imports alongside direct citation pasting. Extracts references from uploaded PDFs, manuscripts, and Google Docs instantly.
Audit Full Bibliography
Runs citation matching and cross-checking across full bibliographies, reference lists, in-text citations, journal articles, book citations, medical citations, and preprints in a single pass. Delivers a complete mismatch report before submission.
Reformat And Regenerate Citations
Reformats citations and regenerates references from DOI with automatic format correction across any supported style. Produces submission-ready references without manual metadata editing.
Connect Reference Managers
Integrates with Zotero, Mendeley, EndNote, RefWorks, Overleaf, JabRef, Pandoc, Quarto, and LaTeX through a fully CSL-aware pipeline. Keeps verified references in sync with existing reference management workflows.
Find Real Sources
Searches academic databases to locate verified replacements for any unconfirmed or fabricated reference. Returns direct source links so a confirmed citation immediately replaces an unverified entry.
Check Any Academic Document
Check Course Papers
Verifies citations in course papers, student essays, and academic writing to catch source errors before submission.
Verify Dissertation References
Audits every reference in dissertations and doctoral theses to eliminate fabricated or inaccurate citations across large bodies of work.
Audit Journal Manuscripts
Screens citations in journal articles and research submissions to resolve errors before peer review or initial editorial screening.
Screen Peer Reviews
Checks references in papers under review to catch fake or mismatched citations during the initial screening stage.
Verify Books and Articles
Confirms citations in books, articles, ebooks, and academic papers using demo papers and sample citations as worked examples.
Built For Every Researcher
Support Students And Undergraduates
Students and undergraduates verify scholarly citations in course papers and academic submissions to confirm source accuracy before submitting.
Guide PhD Candidates
PhD, Master's, and doctoral candidates audit full dissertations and theses to eliminate fabricated references across large reference lists.
Assist Researchers And Scholars
Research scientists and postdoctoral scholars verify citations in academic publications to maintain citation accuracy and uphold research integrity.
Equip Editors And Reviewers
Journal editors, academic editors, and dissertation advisors screen manuscripts for citation fraud and bogus references at the initial review stage.
Help Professors And Faculty
Professors and contributing faculty check student submissions to flag suspicious citations and enforce academic rigor across courses.
Verify In Three Steps
Paste Your Citations
Paste a citation or upload a manuscript from Word, Google Docs, or an existing draft. Check one citation or run citations per batch with no signup or account required.
Run Citation Check
CudekAI runs AI-powered analysis using retrieval algorithms and a comprehensive verification system. It detects errors, produces a mismatch report, and flags every citation that failed verification.
Review Your Matches
Review each citation's confidence score, showing verified, partial, or unverified status alongside direct source links for every confirmed match.
Choose CudekAI Citation Checker
Verify In Seconds
Citation Checker delivers instant checking with single-click batch verification, eliminating manual reference review and saving hours across large reference lists.
Trust Verified Accuracy
CudekAI applies a proprietary citation verification scoring model to generate a confidence score for every reference, reducing citation errors and improving submission quality.
Uphold Academic Integrity
Citation Checker catches fabricated citations, citation fraud, and AI-hallucinated references to protect academic reputation and careers from retraction risks and misconduct flags.
Check Citations Free
CudekAI's citation checker is a free, browser-based tool with daily citation checks and a monthly quota requiring no signup, no credit card, and no account.
Verify Across Platforms
CudekAI Citation Checker runs via Chrome extension, API, MCP, and browser with user guides, a product tour, and Google login for seamless cross-platform access.
Supported Languages
CudekAI's Citation Checker verifies citations written in 38+ languages, cross-referencing every reference against international academic databases regardless of the language it is written in.
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English
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Chinese Simplified
Chinese Traditional
Croatian
Czech
Danish
Dutch
Filipino
Finnish
French
German
Greek
Hebrew
Hungarian
Indonesian
Italian
Japanese
Korean
Latvian
Lithuanian
Polish
Portuguese
Romanian
Russian
Serbian
Slovak
Slovenian
Spanish
Swedish
Thai
Turkish
Ukrainian
Uzbek
Vietnamese
Pricing
Professionals and everyday users rely on it
Caught fabricated references I missed
Caught three fabricated references in a paper I had already proofread twice. The DOI validation alone saved me from a serious submission error.
Daniel
Now a non-negotiable step in my workflow
Running a full bibliography through CudekAI before submission has become a non-negotiable step in my research workflow.
Priya
Confidence scores made triage easy
The confidence scores made it easy to prioritize which citations needed attention first rather than checking every single one manually.
Sofia
Found a mismatch across five papers
Found a mismatched author name on a source I had cited in five different papers. Would never have caught that without the metadata check.
Marcus