Locus combines smart search and AI-assisted information synthesis for students and analysts.

locusextension.com
Locus homepage screenshot

About Locus

Locus is a browser tool for students and analysts that adds natural-language search and AI assistance to reading web pages and PDFs. It works as an alternative to standard Ctrl + F or Cmd + F, finding relevant sections without requiring exact keywords.

With Locus, you can search long articles, papers, and textbooks by describing what you need, summarize full pages or selected portions, and generate note cards for study. It can also suggest additional research topics and related documents, and lets you save answers with Favorites to refer back across documents.

It suits students working with online textbooks and dense papers, and analysts who review news and reports. The service runs in the browser and includes a free tier with daily limits and a paid Professional tier.

Key features

  • Search web pages using natural language queries
  • Search PDF documents with AI
  • Summarize pages or selected sections
  • Create note cards for study review
  • Save answers with Favorites across documents
  • Suggest related research topics and documents
Best for: Students and analysts who regularly read long web pages, papers, and PDFs.
Good for
  • Works on both web pages and PDFs
  • Finds sections without exact keywords
  • Free tier available with core search functions
  • Supports several AI models
Watch out for
  • Free plan limited to 3 documents daily
  • Unlimited documents and actions require paid plan

Locus at a glance

Type
Website
Pricing
Freemium
Platforms
Web
Open source
Not stated
Good for
Students
Last checked
Oct 5, 2026 · Online when checked
Listed
Oct 5, 2026

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Locus FAQ

What is Locus?
Locus is a browser tool that provides natural-language search and AI assistance for reading web pages and PDFs.
How is Locus different from Ctrl + F?
Instead of matching exact keywords, Locus finds the relevant section based on the meaning of your query.
Does Locus work with PDFs?
Yes, Locus can search PDF documents as well as web pages.
How much does Locus cost?
Locus offers a Free plan with daily limits and a paid Professional plan with no document limits.
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