Preprint Citation Index

Preprint Citation Index is a multidisciplinary collection of preprints from a wide range of leading preprint repositories.

Each record in the product contains standard bibliographic metadata such as author, abstract, keywords, descriptor terms, and more. Enhanced Metadata includes full author addresses, grant funding and cited references. Full versioning metadata is not included.


Coverage includes research areas in the life sciences, mathematics, computer science, engineering, social science, and humanities. The Preprints Citation Index covers the entire repository, however each repository has a different start date:

  • arXiv:

    physics, mathematics, computer science, quantitative biology, quantitative finance, statistics, electrical engineering and systems science, and economics


  • bioRxiv: biology



  • medRxiv:

    medical, clinical, and related health sciences


  • chemRxiv:

    chemistry and related fieldss



    multidisciplinary spanning science, social sciences, and arts & humanities


Key Features

Discovering preprints in the Web of Science environment simplifies the process of evaluating preprint quality and trustworthiness by connecting preprints to the versions of record and linking to other scholarly output from preprint authors. Find earliest mentions of a topic in preprint literature back to 1991 from arXiv and include all disciplines in your searching, including arts & humanities.

  • Standalone aggregated preprint search

    • 5 repositories covering approximately 2.5M preprint records and over 20 repositories to be added in future

  • Preprint authors linked to Web of Science Core Collection author records (when searching the Preprint Citation Index) to give indicator of quality and likelihood of eventual publication.

  • Links to published articles indexed in WoS Core Collection

  • Preprints on author profiles with alerting when new content is added

  • Versioning of records provided by repositories

  • Citing reference network allowing researchers to find cutting edge research that has not yet been published

  • Bidirectional links between published article and preprint version

  • Saved search alerts, citation alerts

  • Export to plain text, Excel

  • Reputational metrics to help a user decide whether a preprint is trustworthy

  • Citing preprints - to see the latest preprints relating to a published scholarly article

  • Preprints included in existing author records

Citation counts

  • Citation count from preprints (citation from other preprints)

  • Citation count from All Databases, including WoS Core Collection and excluding citation from preprints (preprint silo)

  • Citation count from All Databases excluding preprints

  • Citation count from All Databases, including preprints

  • Link to citing preprints