Chronograph analyzes which websites people come from when they click on a DOI.

Referrals from domains to DOI resolutions

Enter a domain to see referrals from that domain to Crossref DOIs. Domains belonging to primary publishers are excluded.

DOI resolutions

Enter a DOI to see resolutions over time.

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Top 10

See the top 10 non-publisher domains that refer DOIs.


See the proportion of DOI referrals that are from HTTPS vs HTTP.

Wikipedia example

Wikipedia has a lot of DOIs, and they're followed.

DOI example

See resolution data for the DOI 10.1016/j.imavis.2011.05.002

How it works

See how we generate these numbers.

Blog posts

Read the story so far...

This is a Crossref labs project.