Zenodo is a general-purpose data repository built on open source software that accepts all forms of research output from data files to presentation files. It was developed by the European Organization for Nuclear Research (CERN), but is open to researchers from outside the EU. Data is stored in the CERN Data Center, which provides long-term preservation.

  • Data size and format:
    • File size limit: 2GB, but Zenodo will work with researchers to upload larger files. The infrastructure has been tested with files up to 10GB in size.
    • Dataset size limit: No limit, although quotas for uploads may be introduced in the future.
    • Data types and formats hosted: All file types are accepted. Files are categorized as: publications, posters, presentations, datasets, images, software, videos/audio, and lessons. Zenodo also integrates with GitHub to deposit GitHub repositories for sharing and long-term preservation.
  • Data licensing: Users can choose from a long list of licenses, with the default being Creative Commons Zero (CC0).
  • Data attribution and citation tools: Zenodo assigns DOIs to each file upload, or allows the user to enter a previously assigned DOI.
  • User access controls: Users can choose to deposit files under open, embargoed, restricted, or closed access. For embargoed files, the user can choose the length of the embargo period, and the content will become publicly available automatically at the end of the embargo period. Users may also deposit restricted files and grant access to specific individuals.
  • Data access tools:
    • Search: Free-text search functionality is provided. Machine-readable metadata are also recorded, according to the Invenio Digital Library Framework. Zenodo communicates with existing services, such as Mendeley, ORCID, CrossRef, and OpenAIRE for pre-filling metadata. All metadata is openly available on the site, regardless of the type of data access selected.
      Download: In addition to individual file downloading, Zenodo has an OAI-PMH API for programmatic data and metadata access, as described in the API documentation.
    • Proprietary file format access: none
    • Data analysis: none
  • Cost: free


Who Zenodo is well suited for:

  • any researcher who wants to share data with collaborators or the public
  • any researcher seeking a DOI for a dataset or group of related datasets

Where Zenodo falls short:

  • The 2GB individual file size limit may be problematic.
  • Proprietary file types are accessible only to users with access to the necessary software.