BibTeX validator

Example input

@article{example2026,
  author = {Example, A.},
  title = {Synthetic teaching record A},
  journal = {Example Journal},
  year = {2026}
}

@article{example2026,
  author = {Example, B.},
  title = {Synthetic teaching record B},
  journal = {Example Journal},
  year = {2026}
}

Expected check and correction

2 entries, 1 error: the example2026 key is duplicated.

example2026 → example2026a
example2026 → example2026b

Give each record a unique key and update the corresponding \cite commands in your document. This corrected synthetic example should have 2 entries and 0 errors.

@article{example2026a,
  author = {Example, A.},
  title = {Synthetic teaching record A},
  journal = {Example Journal},
  year = {2026}
}

@article{example2026b,
  author = {Example, B.},
  title = {Synthetic teaching record B},
  journal = {Example Journal},
  year = {2026}
}

Common mistake and remedy

Passing this check does not mean a citation in your document will resolve. Compare the key’s exact spelling and case, then inspect the compilation log separately.

Before copying

This limited syntax check does not compile LaTeX, cover every BibLaTeX extension or verify that sources exist. Compare the fix preview with your original file and keep a backup.