OpenCitations data downloads

Access all data dumps from OpenCitations Meta and OpenCitations Index

Data available through Zenodo, Figshare and the Internet Archive

Meta

Bibliographic metadata for all publications in the OpenCitations Index

Latest: June 2026 dump

Includes data on 147M+ bibliographic entities, 422M+ authors, and 2.3M+ publication venues

View Meta downloads
Updated on 2026-06-27
Index

OMID-to-OMID references representing all citations from multiple sources

Latest: July 2026 dump

Includes data on 2.5 billion+ citations from various sources

View Index downloads
Updated on 2026-07-28

OpenCitations Meta

The OpenCitations Meta database stores and delivers bibliographic metadata for all publications involved in the OpenCitations Index.

Most recent OpenCitations Meta data dump - June 2026

Released on 2026-06-27, compared to the previous version, includes metadata related to citing and cited bibliographic resources added from the February 2026 version of Crossref and the August 2025 version of JaLC. It also includes an alignment with OpenAlex identifiers and introduces OUTCITE and Matilda as new sources.

Key statistics

147M+

Bibliographic entities

422M+

Authors

2.3M+

Publication venues

3,673,399 editors and 115,504,540 publishers (counted by roles, without disambiguating individuals)
Download files
Type and format Archive Size
Metadata database (OpenLink Virtuoso) Kubernetes ready Download 7z 31.2GB zipped (187GB uncompressed)
Metadata (CSV) Download 7z 8.4GB zipped (56GB uncompressed)
Metadata and provenance (RDF) Download 7z 45.7GB zipped (72GB uncompressed)
Provenance database (QLever) Download 7z 41.6GB zipped
Previous dumps

Compared to the previous version, includes metadata related to citing and cited bibliographic resources added in the September 2025 version of Crossref, as well as the DataCite Public Data File 2025.

Available in CSV (metadata), OpenLink Virtuoso database, RDF (metadata and provenance), and OpenLink Virtuoso provenance database.

The metadata CSV is available on Figshare at the following link: https://doi.org/10.6084/m9.figshare.21747461.v11

Metadata and Provenance is available on Figshare at the following link: https://doi.org/10.6084/m9.figshare.21747536.v8

Compared to the previous dump, this one adds the metadata contained in the Crossref dump dated March 2024.

Available in CSV (metadata) and JSON-LD (metadata and provenance) formats.

Compared to the previous dump, this one incorporates OpenAlex IDs, leveraging data from the OpenAlex dump.

Available in CSV (metadata) and RDF (metadata and provenance) formats.

Compared to the previous dump, this one adds the metadata contained in the Japan Link Center (JaLC).

Available in CSV (metadata) format.

OpenCitations Index

The OpenCitations Index stores OMID-to-OMID references representing all the references gathered from several sources.

Most recent OpenCitations Index data dump - July 2026

Released on 2026-07-28, this dataset adds the citation data contained in the February 2026 version of Crossref and the August 2025 version of JaLC. Also this version introduces two new sources: OUTCITE and Matilda.

Key statistics

2.5 Billion+

Citations (2,559,460,009)

Download files
Type and format Archive Size
Citations database (Qlever) Kubernetes ready Download 7Z 69GB zipped (132GB uncompressed)
Citations database RDF data Download 7Z 64GB zipped (1.5T uncompressed)
Citation data (CSV) TBA TBA
Citation data (N-Triple) TBA TBA
Citation data (Scholix) TBA TBA
Provenance data (CSV) TBA TBA
Provenance data (N-Triple) TBA TBA
Additional files
Type and format Archive Size
Citation data sources' info (N-Triple): information regarding the data source collection (e.g., COCI, DOCI, POCI, etc) of all the citation data TBA TBA
Citation count data (CSV): the number of incoming citations to each bibliographic entity (identified by a DOI) in OpenCitations Index TBA TBA
OpenCitations OMID Index for Bibliographic Resources (BR) and Responsible Agents (RA) (CSV) TBA TBA
Previous dumps

Database available as Qlever triplestore and RDF for the stored data in it.

Data dump available in CSV (citation data), N-Triple (citation data), SCHOLIX (citation data), CSV (provenance data), and N-Triple (provenance data).

In addition, a N-Triple containing information regarding the data source collection; in CSV Citation count data; and in CSV an the OMID (br and ra) Index

Available in CSV (citation data), N-Triple (citation data), SCHOLIX (citation data), CSV (provenance data), and N-Triple (provenance data).

In addition, a N-Triple and CSV dump, containing information regarding the data source collection.

Available in CSV (citation data), N-Triple (citation data), SCHOLIX (citation data), CSV (provenance data), and N-Triple (provenance data).

In addition, a N-Triple and CSV dump, containing information regarding the data source collection.

Available in CSV (citation data), N-Triple (citation data), SCHOLIX (citation data), CSV (provenance data), and N-Triple (provenance data).

In addition, a N-Triple dump containing information regarding the data source collection, and a citation count dump with the number of incoming citations to each bibliographic entity (identified by an OMID).

Available in CSV (citation data), N-Triple (citation data), SCHOLIX (citation data), CSV (provenance data), and N-Triple (provenance data).

In addition, a N-Triple dump containing information regarding the data source collection, and a citation count dump with the number of incoming citations to each bibliographic entity (identified by an OMID).

Available in CSV (citation data), N-Triple (citation data), SCHOLIX (citation data), CSV (provenance data), and N-Triple (provenance data).

In addition, a N-Triple dump containing information regarding the data source collection.