Completeness
Checks whether an author or institution and a publication year can be identified.
Free tool · no sign-up
Check your bibliography for free
Check up to five references for missing details, possible duplicates, DOI and URL information, plus common APA 7 and Harvard issues.
5 references free no sign-up APA 7 & Harvard
Check up to 5 references
Enter one reference per line. Separate multi-line references with a blank line.
Free quick check · maximum 5 references per check
What the bibliography checker reviews
The free checker is a formal pre-check. It helps you spot common reference-list issues before reviewing every source manually.
Duplicates
Flags very similar or duplicated references.
DOI & URL
Detects DOI and web addresses; DOI values are verified via Crossref when possible.
APA 7 & Harvard
Flags common formal patterns. Your university's own guidelines take priority.
The checker does not assess academic quality and does not replace your university's citation guidelines.