Reference lists get messy. Some titles are capitalised and some aren't, the same venue is written five different ways, preprints stand in for papers that came out a year ago, and now and then there's a citation that doesn't exist at all because a chatbot made it up.
BibFix tries to fix all of that in one place. It checks each entry against real records (DBLP and Crossref), not a language model, so every change comes from somewhere you can look up. You get back a plain .bib file and a list of what changed. Keep, undo or edit any of it.
To check a bibliography, install BibFix (below) and run bibfix check refs.bib.
What it reports
SafeSame paper; fields added or tidied. Applied by default.
arXivA preprint replaced by its published version. Applied by default.
ReviewTitle, authors or type differ, so possibly a different paper. Not applied.
Not foundNeither DBLP nor Crossref knows it. Check that it exists.
DuplicateOne paper cited under several keys.
Install
uv tool install git+https://github.com/narunraman/bibfixbibfix dblp-update # downloads DBLP; rerun monthly
Use
bibfix check refs.bib --tex main.tex # report onlybibfix fix refs.bib -i # apply the safe and arXiv fixes
With Zotero: bibfix sync, bibfix push and bibfix add.