Zotero is where a lot of researchers keep their entire reading life — hundreds of PDFs, notes, and references, all organised. Naturally, people want to point an AI at that library and ask it questions. There are two ways to get there, and they solve different problems: plugins that add AI inside Zotero, and reading assistants that give you cited answers from the papers themselves. This is an honest look at both.
Two approaches, honestly
- Zotero AI plugins add chat and Q&A into the Zotero app — over your library metadata, your notes, or the PDFs attached to items. They're the right tool if you want the AI to live where your references already do.
- Reading assistants for the papers work on the paper you're reading — an arXiv page, a PDF in your browser — and answer with citations to the exact passage. They don't touch your Zotero library, but they're strong at the actual reading.
Neither replaces the other. Many researchers use a Zotero plugin to work over the library and a cited reader to work through individual papers.
Zotero AI plugins
Zotero has an active plugin ecosystem, and several community plugins add AI chat and PDF Q&A to it. Because these are community-maintained and change often, the most reliable place to see what's current — and what each actually does — is Zotero's own plugin directory rather than any static list. When you evaluate one, check:
- What it reads. Library metadata only? Your notes? The full text of attached PDFs? This varies a lot and determines what you can actually ask.
- Where the AI runs. Some plugins call an external API with your own key; know what leaves your machine.
- Whether answers are traceable. Can you tell which item or passage an answer came from, or is it a black box?
Reading the papers themselves — with citations
For the other half of the job — genuinely reading and questioning a paper — a citation-first reader is hard to beat. Sidenote is a browser reading assistant that works on the paper you have open: an arXiv page, a PDF, a journal article. To be clear about what it is: it doesn't integrate with your Zotero library — it reads the paper in front of you, not your reference manager. What it's good at is the reading.
- Cited answers. Ask about a paper's method, result, or limitation and each claim carries a citation to the exact sentence; click it and the paper scrolls there and highlights it.
- Nothing invented. Claims that can't be grounded in the text are dropped, which matters a lot for research, where a plausible-but-wrong summary of a finding is worse than no summary.
- Explain the dense bits. Highlight a thick passage and get a plain-language explanation tied to that text — useful for papers outside your subfield. See how to read research papers faster and how to understand academic papers.
- Question several at once. Group a few papers into a Collection (part of Pro; 7-day trial, no card) and ask across them — where they agree, where they differ — with each answer citing the source paper.
Which do you need?
| Goal | Reach for |
|---|---|
| Chat over your whole Zotero library | A Zotero AI plugin (check the directory) |
| Search your references and notes | A Zotero AI plugin |
| Read and question a specific paper | A cited reader like Sidenote |
| Verify a claim against the exact sentence | A cited reader like Sidenote |
| Compare a few papers side by side | A cited reader with collections |
Frequently asked questions
Is there an official AI plugin for Zotero?
AI for Zotero comes from community plugins rather than one official feature, and they change often — so check Zotero's plugin directory for what's current and confirm whether each one reads your attached PDFs or only library metadata before you rely on it.
Does Sidenote integrate with Zotero?
No. Sidenote reads the paper you have open in your browser — an arXiv page, a PDF, an article — and answers with citations to the exact passage. It doesn't connect to your Zotero library. Think of it as a strong reading layer for individual papers, complementary to a Zotero plugin that works over your whole collection.
What's the best way to actually read and verify a paper with AI?
Use a reader that cites the exact sentence behind every claim and drops anything it can't ground in the text, so you can check a summarised finding in one click. Sidenote is built around this for papers, PDFs and articles.