Definition · Plain-language
Zotero
Zotero is a free, open-source reference manager developed by the Corporation for Digital Scholarship to help researchers collect, organise, annotate, and cite scholarly sources.
The step most authors miss
Doing CRediT right? Don’t stop at the statement.
A CRediT statement credits you inside one paper. The recognition CRediT was built for happens when those roles are tied to you, persistently. Sign in with your ORCID — free — and claim your CRediT contributions on casrai.org, the home of the standard. They become a verified, portable part of your identity, not a line that disappears into one PDF.
Free: claim your contributions, then export a journal-ready CRediT statement, schema.org structured data, JATS XML, CSV or BibTeX — and preview your public profile. A membership publishes that profile publicly and verifies the journals you serve.
Core Features and Browser Integration
Zotero is built around a robust desktop application that works seamlessly alongside browser extensions for Firefox, Chrome, Safari, and Edge. When browsing online academic databases, publisher websites, or library catalogues, the Zotero connector automatically detects research items on the page. A single click imports the complete bibliographic metadata, index information, and the full-text PDF if open access or institutionally accessible. Within the desktop client, users can organise items into custom collections, assign descriptive tags, and perform deep full-text searches across their entire library. Researchers can also view, highlight, and annotate PDF documents directly within the application using its sophisticated built-in reader, which consolidates all notes in a central, searchable database.
Citation Generation and Word Processor Integration
Zotero simplifies the writing process through official, native plugins for Microsoft Word, Google Docs, and LibreOffice. These plugins allow writers to query their Zotero database and insert in-text citations directly without leaving their active document editor. Zotero maintains a dynamic database link between the text document and the citation manager, meaning that modifying a reference's metadata in the desktop app automatically corrects the citation in the document. Switching citation styles, such as changing from APA to Harvard or Vancouver, instantly updates every in-text citation and regenerates the bibliography at the end of the manuscript. This dynamic formatting supports over ten thousand different journal styles, ensuring compliance with diverse publisher requirements.
Cloud Synchronisation and Collaboration
Although Zotero prioritises local data storage, it offers free cloud synchronisation for bibliographic metadata, enabling researchers to access their collections across multiple operating systems. While citation text sync is unlimited, Zotero provides three hundred megabytes of free cloud storage for PDF attachments, which researchers can expand through paid subscription tiers or by configuring free, third-party WebDAV services. Furthermore, Zotero supports group libraries, which are shared cloud folders where research teams can compile references, build joint bibliographies, and co-manage PDF resources. This collaborative feature is highly valued for multi-institutional projects, as it allows members to annotate documents collectively, visualising each contributor's input and facilitating seamless collaboration without subscription costs.
Key facts
At a glance
- Zotero is free, open-source, and managed by the non-profit Corporation for Digital Scholarship.
- It supports Windows, macOS, Linux, and iOS, with official browser connectors for major browsers.
- It offers unlimited cloud syncing for text-based citation data, with 300 megabytes of free PDF storage.
- Word processor plugins are available for Microsoft Word, Google Docs, and LibreOffice.
- It supports over ten thousand citation styles, including APA, MLA, Chicago, and Harvard.
Common misconceptions
What people often get wrong
Often heard: Zotero requires a constant internet connection to function.
Actually: Zotero is a local desktop application that operates completely offline; synchronisation with the cloud is optional and occurs in the background when connected.
Often heard: Zotero will lock your bibliographic data into a proprietary format.
Actually: Zotero prioritises data portability, allowing users to export their entire library in open formats like BibTeX, RIS, and RDF at any time.
Often heard: You must pay to use Zotero if you exceed the free storage limit.
Actually: The storage limit applies only to attached PDF files and images; citation metadata remains free and unlimited, and users can use third-party cloud storage (WebDAV) to sync files.
Common questions
FAQ
Is Zotero completely free to use?+
Yes, Zotero is free to download and use. It offers unlimited local storage for references and PDFs. Its cloud sync service is also free for citation data, but PDF file attachments are limited to 300 megabytes of free storage, which can be expanded through paid tiers.
Can I share my Zotero library with collaborators?+
Yes, Zotero features Group Libraries which allow you to share references and PDFs with other Zotero users. You can create public groups (visible to all) or private groups (invite-only) to collaborate on research and compile shared bibliographies.
How does Zotero capture citations from web browsers?+
Zotero uses browser extensions called Zotero Connectors. When you visit a publisher's site or search engine, the connector translates the web page metadata into a citation format, allowing you to save the item to your library with a single click.
Going deeper
