Zotero

Zotero

Free

Free, open-source reference manager for collecting, organizing, citing, and sharing research with browser integration and 9,000+ citation styles.

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What is Zotero?

Zotero is a free, open-source reference management tool developed by the non-profit Corporation for Digital Scholarship, trusted by millions of researchers, academics, and students across all disciplines. Its browser connector extension (available for Chrome, Firefox, Safari, and Edge) detects and saves bibliographic information and PDFs from websites, library catalogues, PubMed, Google Scholar, and thousands of academic databases with a single click. Zotero 7, released in August 2024, introduced a major redesign with a built-in PDF, EPUB, and HTML reader featuring comprehensive annotation tools including highlighting, ink annotations, and text comments that sync across desktop and mobile apps. Zotero instantly generates in-text citations and bibliographies in over 9,000 citation styles directly inside Word, LibreOffice, and Google Docs. Group libraries enable unlimited collaboration with no seat limits. Cloud sync keeps your library available from any browser, and 300 MB of free storage is available with paid upgrades for heavier PDF collections. Zotero's open-source nature has spawned a rich plugin ecosystem including AI-powered tools for paper chat and semantic search.

Key Features

One-Click Browser Saving9,000+ Citation StylesWord and Google Docs IntegrationBuilt-In PDF and EPUB ReaderPDF Annotation and HighlightingInk and Text AnnotationsCross-Device SyncGroup Libraries with Unlimited MembersCloud Web Library AccessiOS and Android AppsBibTeX and RIS ExportSaved SearchesCollection and Tag OrganizationDOI and ISBN LookupDuplicate DetectionPlugin EcosystemOpen Source and Free

How to Use Zotero

1Download Zotero from zotero.org and install the browser connector
2Browse to any paper, book, or article page and click the connector icon to save
3Organize saved items into collections and tag them by topic
4Open papers in Zotero's built-in reader and annotate PDFs with highlights and notes
5Cite directly in Word or Google Docs and generate bibliographies in any citation style

✅ Best For

  • Students and academic researchers who want a completely free, full-featured reference manager with no usage limits, seamless word processor integration, and thousands of citation style options for any journal or institution.
  • Labs and research groups that need to share a collaborative library with unlimited team members at no cost, annotate shared PDFs, and maintain a synchronized group bibliography.
  • Power users and developers who want an open-source, extensible platform they can customize with a rich ecosystem of community-built plugins for AI chat, semantic search, and advanced bibliography management.

❌ Not For

  • Researchers who need built-in AI-powered literature discovery, semantic search across databases, or systematic review automation, as Zotero is a reference organizer and does not search academic databases natively for new papers.
  • Teams that require formal institutional support, commercial SLAs, or dedicated customer service, since Zotero is community-supported through forums without professional helpdesk services.

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Pricing

Free$0
  • ✓Unlimited references
  • ✓300MB cloud storage
  • ✓all core features
Storage 2GB$20/year
  • ✓2GB cloud file sync
Storage 6GB$60/year
  • ✓6GB cloud sync
Storage Unlimited$120/year
  • ✓Unlimited cloud storage
LabCustom
  • ✓Institutional plans with unlimited storage per user

Prompts to Try

Organize all my saved papers by research theme and generate an APA bibliography

Find and merge all duplicate entries in my Zotero library

Export my entire collection as a BibTeX file for my LaTeX manuscript

Use Cases

A history PhD student saves 200 archival sources into Zotero over six months using the browser connector, organizes them by century and region, and generates a Chicago-style bibliography for her dissertation in one click without any manual formatting.
A microbiology lab sets up a shared Zotero group library for their entire 12-person team, allowing everyone to annotate PDFs and contribute references to a shared collection that automatically syncs for all members at no cost.
A science journalist installs the Zotero browser connector and saves every paper, news article, and report he reads during a three-month investigation into antibiotic resistance, creating a traceable source archive for editors to review.
An undergraduate student uses Zotero's Google Docs integration to insert 40 citations throughout her term paper in APA 7th edition, with Zotero automatically formatting and alphabetizing the reference list at the end.
A developer installs the PapersGPT plugin for Zotero to enable AI-powered chat with papers in his library, extracting key arguments from 15 PDFs in a fraction of the time it would take to read each one manually.

Frequently Asked Questions