What is Locus?
Search web pages and PDFs by meaning, with summaries and note cards.
Who is Locus best for?
Locus is best for students and researchers who read long web pages and PDFs in Chrome and want to search by meaning.
Dense research papers
Describe the passage you need in plain words and it jumps to the matching section, even when you have forgotten the exact term.
Online textbooks and revision
It turns what you find into note cards to study from and keeps answers as favorites you can return to.
Fast news reading
Page summaries show which parts of a long article are worth your time before you read it.
People with their own OpenAI key
Professional users can add an OpenAI API key for unlimited use, and the key never leaves the browser.
How much does Locus cost?
Locus is free forever with daily limits, and its Professional plan costs $9 a month or $90 a year, with 14 or 30 days free to start.
- 3 documents a day
- Plain-language search of web pages and PDFs
- AI summaries and saved favorites with a free account
- No limits on documents, searches or AI actions
- Newest AI models and a choice of AI role
- Unlimited OpenAI use with your own API key
Billed yearly, Professional costs $90 a year, which works out to $7.50 a month. The monthly plan starts with 14 days free and the yearly plan with 30 days free. Full pricing on locusextension.com. We checked these prices on .
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Questions about Locus
What is Locus?
Search web pages and PDFs by meaning, with summaries and note cards.
Who is Locus for?
Locus is best for students and researchers who read long web pages and PDFs in Chrome and want to search by meaning.
Is Locus free?
Yes. Locus has a free-forever plan with plain-language search of web pages and PDFs, capped at 3 documents a day. Professional removes the limits for $9 a month with 14 days free, or $90 a year with 30 days free.
How much does Locus cost?
Locus's paid plans are Professional at $9 per month.
Where can I try Locus?
On its official website, locusextension.com.
Is Locus a Chrome extension?
Yes. Locus runs as a Chrome extension that replaces Ctrl+F (Cmd+F on a Mac) with a search that understands plain questions. It works on web pages and PDFs open in the browser, and a side panel holds summaries and favorites.
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