Look up a DOI
Any format works: 10.1038/nature14539, https://doi.org/10.1038/…, or doi:10.1038/…. Data comes from Crossref, with the abstract filled in from OpenAlex when Crossref lacks one.
Find DOIs for references
One reference per line, any format — even partial or messy. Each line is matched against Crossref's 160M+ records. Results show a confidence check so you can trust (or reject) each match.
Looked up one at a time to stay polite to the free API