Structured bibliography validator

BibTeX Validator

Parse BibTeX, find missing fields and duplicate keys, validate DOI metadata, and export a normalized bibliography.

References stay in this browser Metadata from Crossref Free forever · No sign-up · No usage credits

BibTeX Validator

Local analysis · DOI-only lookup

BibTeX data

0 entries detectedMaximum 25 DOI lookups per run

About this audit

Catch structural errors before LaTeX does

BibTeX files often accumulate duplicate citation keys, missing titles, inconsistent DOI values, and entries copied from different databases. The validator uses Citation.js to parse records into structured CSL data before applying field and duplicate checks.

Required fields vary by bibliography style and BibTeX implementation. The report focuses on broadly useful fields and preserves your source data so that style-specific decisions remain under your control.

Three-step workflow

Run a focused reference check

Paste the BibTeX entries.
Review parser, field, key, DOI, and duplicate findings.
Copy or download normalized BibTeX.

01Parse locally

Your reference text is separated and normalized inside the browser.

02Resolve identifiers

Only detected DOI names are sent for public Crossref metadata lookup.

03Compare evidence

Registry titles, years, identifiers, and text similarity become review findings.

04Keep editorial control

The report flags uncertainty instead of silently inventing missing source details.

Frequently asked questions

Questions about BibTeX Validator

Which entry types are supported?

Citation.js parses common BibTeX and BibLaTeX entry types, including articles, books, proceedings papers, theses, and web resources.

Does validation change citation keys?

No. Existing keys are preserved unless Citation.js must generate an identifier for an entry without one.

Can it verify DOI metadata?

Yes. DOI values are resolved through Crossref when available.