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Zotero

In-depth entry

by Corporation for Digital Scholarship · Application

Free, open-source reference manager with browser connectors, word-processor plugins, a PDF reader, group libraries and optional paid file storage

AGPL-3.0-only licenseFreeOpen sourceFreemiumLocalCloudSelf-hostable
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Link verified Nov 2, 2026

Overview

Zotero is a free, open-source reference manager developed by the non-profit Corporation for Digital Scholarship. The desktop application runs on macOS, Windows and Linux and stores a local library of bibliographic items, attached PDFs, notes and tags; companion apps exist for iOS and Android. The Zotero Connector browser extension captures references and full texts from publisher pages, catalogs and databases with one click, and word-processor plugins insert citations and bibliographies in Microsoft Word, LibreOffice and Google Docs using thousands of CSL styles.

Version 7 and later include a built-in PDF and EPUB reader with highlighting and annotation that flows into notes, duplicate detection, RSS feeds, related items, and a plugin system; the third-party Better BibTeX plugin is widely used by LaTeX authors to maintain stable citation keys and auto-exported .bib files. Libraries sync through Zotero's servers, where metadata sync is free and attachment storage above a basic allowance is sold as yearly individual, lab and institutional subscriptions that fund development; file sync can alternatively point to a user's own WebDAV server. Group libraries support shared collections for teams and classes, and a documented web API allows scripted access.

Zotero is licensed under the AGPL-3.0, and the client, connector and web library are all developed in the open. Practical limits include the lack of a native full-text search across remote storage, the dependence on site translators that occasionally break when publishers redesign pages, and the need for a storage plan or WebDAV setup when syncing many PDFs.

Editorial note on uncertainty. self_hostable refers to the open-source client with WebDAV file sync and the open-source dataserver; the hosted sync service is operated by Zotero.

Capabilities

  • Capture references and PDFs from the browser via the Zotero Connector
  • Cite in Word, LibreOffice and Google Docs with CSL styles
  • Built-in PDF/EPUB reader with annotations and notes
  • Metadata sync with optional file storage or WebDAV
  • Group libraries for collaboration
  • Plugin ecosystem including Better BibTeX for LaTeX workflows
  • Web API and export to BibTeX, RIS, CSL JSON
  • Desktop apps for macOS, Windows, Linux plus iOS and Android

Typical workflows

  1. Collect sources while browsing, then cite in a manuscript
  2. Maintain an auto-exported .bib file for an Overleaf or TeX Live project
  3. Shared lab library with annotated PDFs
  4. Importing a Mendeley or EndNote library

Strengths

  • Free and open source (AGPL-3.0)
  • Non-profit steward with a long track record
  • Works with Word, LibreOffice, Google Docs and LaTeX
  • Own-storage option via WebDAV

Limitations

  • Attachment storage beyond the free allowance is paid
  • Site translators can break when publishers change pages
  • No built-in collaborative PDF annotation outside group libraries
  • Large libraries can make the desktop client slow to sync

Prerequisites

  • Desktop OS (macOS, Windows or Linux)
  • Free zotero.org account for sync

Who it is for

  • Students and academics
  • LaTeX authors via Better BibTeX
  • Research groups sharing libraries

Alternatives & comparison

Mendeley is a free proprietary manager owned by Elsevier with bundled cloud storage but no self-hosted file option; Paperpile is a paid, browser-centred manager tightly integrated with Google Docs; JabRef is a BibTeX/biblatex-native desktop tool without a sync service. Zotero occupies the middle: open source, cross-platform, with optional paid storage.

  • biblatex

    LaTeX bibliography package that reimplements BibTeX formatting in LaTeX macros, with the Biber backend, Unicode sorting and multiple bibliographies

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  • JabRef

    Open-source, BibTeX/biblatex-native reference manager for LaTeX users with online fetchers, groups, file linking and editor integration

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  • Mendeley

    Free reference manager from Elsevier with a desktop and web app, PDF annotation, a Web Importer, groups and bundled cloud storage

    ProprietaryFree
  • Overleaf

    Collaborative online LaTeX editor with real-time co-editing, templates and reference-manager sync, available as a hosted service and an AGPL self-hosted edition

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  • Paperpile

    Subscription reference manager that lives in the browser and Google Drive, with citation plugins for Google Docs and Word and mobile apps

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  • ResearchRabbit

    Literature-discovery app that grows collections of papers through citation and author networks and recommends related work, with a free-forever tier

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Sources & verification

Primary sources consulted for this record. Claims are tied to the fields each source supports; the automated link checker re-verifies every URL on a schedule.

  • License
    zotero/zotero COPYING

    https://github.com/zotero/zotero/blob/main/COPYING

    Supports: license_spdx, source_model

    checked Nov 1, 2026
  • Official documentation
    Zotero Documentation

    https://www.zotero.org/support

    Supports: capabilities, interfaces

    checked Nov 1, 2026
  • Official site
    Zotero | Your personal research assistant

    https://www.zotero.org/

    Supports: name, summary

    checked Nov 1, 2026
  • Pricing page
    Zotero | Storage

    https://www.zotero.org/storage

    Supports: pricing_model, vendor

    checked Nov 1, 2026
  • Repository
    zotero/zotero

    https://github.com/zotero/zotero

    Supports: repo_url, languages

    checked Nov 1, 2026
Confidence
High
Reviewed
Nov 1, 2026
Links
Verified · Nov 2, 2026

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biblatex

Philip Kime and contributors · LaTeX & typesetting

LaTeX bibliography package that reimplements BibTeX formatting in LaTeX macros, with the Biber backend, Unicode sorting and multiple bibliographies

LPPL-1.3cFreeOpen sourceLocalNov 2, 2026