Papertree

Navigate the forest of academic research

Search papers, visualize citation networks, and build your research library — all in one place.

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Everything you need for paper discovery

Paper Search

Search millions of papers by title via OpenAlex. See citation counts, authors, and open access status at a glance.

Citation Graph

Interactive 2D/3D force-directed graph visualization. See how papers cite each other with color-coded directional links.

Paper Library

Save papers, mark as read, and organize your research collection. Synced across devices with your account.

Topic Browser

Explore the OpenAlex topic hierarchy. Browse domains, fields, subfields, and topics to discover new research areas.

Open Access Tracking

See paper availability at a glance. Diamond, Gold, Green OA and more -- with direct links to free full text.

Smart Scoring

Papers in the graph are scored by reference overlap. Find the most relevant citers and references automatically.

How it works

1

Search

Find papers by title. Results show citation counts, year, and open access status.

2

Explore

Click a paper to build its citation graph. Nodes are colored by year, links show citing direction.

3

Collect

Save papers to your library. Track what you've read. See your collection as a connected graph.

Ready to explore?

Sign in with Google to save papers and sync your library across devices. Or jump straight in — search works without an account.

Get Started

Free and open. Powered by OpenAlex.