Paper Brain screenshot

What is Paper Brain?

Paper Brain is a study and research tool designed to help students and researchers organise, annotate, and analyse academic papers and documents. It allows users to upload PDFs, highlight key passages, add notes, and create connections between sources, making it easier to manage research projects and prepare for writing. The tool offers a free tier with essential features, making it accessible to students on a budget, while premium options provide advanced organisation and collaboration features for those who need more power.

Key Features

PDF annotation and highlighting

Mark up papers with colour-coded highlights and margin notes

Document organisation

Create folders and collections to group related papers by topic or project

Note-taking integration

Write and store notes linked directly to specific passages in your sources

Search functionality

Quickly locate papers and annotations across your entire library

Citation management

Generate citations in common formats for your annotated sources

Collaboration tools

Share collections and notes with classmates or research collaborators

Pros & Cons

Advantages

  • Free tier removes barriers for student users managing large reading lists
  • Centralises papers and notes in one place instead of scattered files and notebooks
  • Annotation features preserve context by linking notes to specific document locations
  • Suitable for various research workflows, from literature reviews to thesis work

Limitations

  • Free version may have storage limits or feature restrictions that push users toward paid plans
  • Effectiveness depends on consistent user discipline to annotate and organise materials properly

Use Cases

Undergraduate students organising sources for essays and dissertations

Postgraduate researchers managing dozens of papers for literature reviews

Group project teams sharing and collaborating on research materials

Academics preparing teaching materials by annotating and organising key papers in a field