Reference Checker verifies bibliographic references against scholarly publication records rather than checking formatting alone. Users can paste citations, import from arXiv, or upload 14 formats including PDF, DOCX, BibTeX, RIS, MEDLINE, EndNote, Markdown, and HTML. The service routes searches across Crossref, DataCite, OpenAlex, Semantic Scholar, PubMed, Europe PMC, OpenCitations, Unpaywall, arXiv, OpenReview, DBLP, and ACL Anthology. It compares DOI, title, authors, year, journal, volume, issue, and pages field by field; flags missing records, wrong DOIs, duplicates, retractions, and ambiguous matches; and supports APA, MLA, Chicago, Harvard, Vancouver, IEEE, and ABNT corrections. Users can save history, export, share reports, and recheck applied changes.