Source Trust Score
Is this source actually any good?
ChatGPT handed you a source and you're not sure you can trust it? Paste a DOI, link, or citation and Corroba grades the source itself in one glance — peer-reviewed or preprint, retracted or clean, indexed, how often it's cited, and whether there's a free copy. Grounded in real databases — never guessed.
What it checks
Peer-reviewed?
Is it a peer-reviewed article, a preprint that hasn't been reviewed yet, a scholarly book, or just a webpage?
Retracted?
Cross-checked against the Retraction Watch record (via Crossref) — so you don't cite a withdrawn study.
Indexed & cited
Whether the journal is listed in DOAJ, and how many times the work has been cited — signals of traction.
Free to read?
If a legal open-access copy exists, we link straight to it.
Questions
- How do I check if a source is trustworthy?
- Paste its DOI, link, or citation. Corroba resolves it to the real record and grades the source itself — whether it's peer-reviewed, a preprint, or a webpage; whether it's been retracted; whether the journal is indexed in DOAJ; and how often it's been cited. It's a factual snapshot from real databases, not an opinion.
- How do I know if a paper has been retracted?
- Corroba checks the source against the Retraction Watch database, which is now part of the free Crossref record. If the work has been retracted or withdrawn, you'll see a clear warning — one of the most important things to catch before citing.
- What's the difference between peer-reviewed and a preprint?
- A peer-reviewed article has been vetted by independent experts in its field before publication. A preprint has been posted publicly but not yet reviewed — it can be perfectly good, but it hasn't been checked, so cite it with that caveat. Corroba tells you which you're looking at.
- Is it free?
- Yes — check as many sources as you like, free, with no sign-up.
Checking a whole reference list, not one source? Run it all through Corroba Verify →