DOI checker: verify your references before submission
A broken or mistyped DOI in your bibliography points reviewers to a dead link and signals a rushed submission. Because DOIs are easy to copy incorrectly and references are rarely re-checked, invalid DOIs slip into papers constantly.
Quick answer
To check your DOIs, verify each one resolves on CrossRef and that the resolved record matches your citation's title and authors. LaTeX Formatter checks your whole .bib at once against CrossRef, flagging dead DOIs and titles that do not resolve - a common sign of a mistyped or AI-hallucinated reference. You can also use the free DOI validator at /tools/doi-validator.
Why DOIs break
DOIs are copied by hand or pulled from inconsistent BibTeX exports, so a single transposed character produces a DOI that resolves to nothing.
AI-assisted reference generation can also fabricate plausible-looking DOIs and titles that do not correspond to any real publication.
How to check DOIs manually
Paste each DOI into https://doi.org/ and confirm it resolves to the intended paper.
Cross-check the title and authors against the resolved record - a DOI that resolves to a different paper is as damaging as a dead one.
For a long bibliography this is slow and error-prone, which is why it is usually skipped.
How LaTeX Formatter verifies DOIs automatically
Upload your .bib alongside your paper and LaTeX Formatter checks every DOI against the CrossRef API, flagging dead DOIs and titles that do not resolve to a real record (a common sign of a hallucinated or mistyped reference).
It reports how many citations it could verify, so a paper that cites sources but ships no .bib gets an explicit 'could not verify' warning rather than a false pass.
Who this helps
- Authors with large bibliographies
- Anyone who used a reference manager export
- Authors who drafted citations with AI tools
Frequently asked questions
Can invalid DOIs cause problems during review?+
Yes. A dead or wrong DOI reduces the perceived rigor of your submission and can create real problems at the proofing and publication stage when the publisher resolves your references.
How do I verify a DOI is real?+
Resolve it through doi.org and confirm the record matches your citation's title and authors. LaTeX Formatter automates this against CrossRef for your whole .bib at once.
Can you detect AI-hallucinated references?+
It flags citations whose titles do not resolve to a real CrossRef record, which is the typical signature of a fabricated reference. It cannot prove intent, but it surfaces the entries worth re-checking.
Check your paper before reviewers do
Upload your .tex or .zip and get a corrected file plus a plain-English changelog in under 60 seconds.
Check My Paper - Free