Locus
A Google Chrome Extension to find information on any webpage.
At a glance
Free + paid · Source review 2026-11-04- Price & billing
Free $0 forever verified: 3 documents daily, smart search, AI helpers, web pages and PDFs, save favorites. Professional amounts are page observations in $ without a named currency, so no paid-tier charge fact is recorded: Professional $7.50 per month billed annually ($90) with 30 days free, or $9 per month with 14 days free, including all Free features, no document limits, newest AI models, and faster processing.
- Free allowance
Free $0 forever verified: 3 documents daily, smart search, AI helpers, web pages and PDFs, save favorites. Professional amounts are page observations in $ without a named currency, so no paid-tier charge fact is recorded: Professional $7.50 per month billed annually ($90) with 30 days free, or $9 per month with 14 days free, including all Free features, no document limits, newest AI models, and faster processing.
- Best suited to
Researchers and readers who search long pages and PDFs daily and want the relevant section found instantly instead of scanning every match.; People who summarize and revisit documents, since Locus offers AI summarization and favorites saved from the sidepanel.; Users who already pay for OpenAI access, since Professional supports bring-your-own GPT API key for unlimited use of OpenAI models.
Fit is editorial guidance, not a measured result.- Platforms
Access: not separately verified. Operating systems not separately verified.
Published-source facts and editorial guidance. No product test is implied. Confirm current conditions before purchase.
No product screenshot is claimed for this listing. Use the official website ↗ to inspect the current interface.
What to know before choosing
Good fit
Researchers and readers who search long pages and PDFs daily and want the relevant section found instantly instead of scanning every match.; People who summarize and revisit documents, since Locus offers AI summarization and favorites saved from the sidepanel.; Users who already pay for OpenAI access, since Professional supports bring-your-own GPT API key for unlimited use of OpenAI models.
Limits and trade-offs
Users who need unlimited documents and actions on the free tier, since Free is capped at 3 documents daily with daily limits on documents and AI actions.; People who do not use Chrome, since Locus is presented as a Chrome extension with a sidepanel and extension icon.
Plans and free allowances
Free $0 forever verified: 3 documents daily, smart search, AI helpers, web pages and PDFs, save favorites. Professional amounts are page observations in $ without a named currency, so no paid-tier charge fact is recorded: Professional $7.50 per month billed annually ($90) with 30 days free, or $9 per month with 14 days free, including all Free features, no document limits, newest AI models, and faster processing.
Evidence
Locus homepage ↗ (reviewed 2026-11-04), Locus FAQ ↗ (reviewed 2026-11-04)
Official published documentation reviewed; not a product test
Dates: Last reviewed 2026-11-04. Last reviewed is the latest source or editorial review date; it is not a content-change date.
A closer look at Locus
Locus is a Chrome extension that reimagines Ctrl+F with AI: it understands your search and immediately finds the relevant section on any web page, with smart search, AI helpers, summarization, and saved favorites across web pages and PDFs. The free tier covers 3 documents daily, while Professional removes limits, adds advanced AI models and OpenAI integration, and speeds up processing.
Editorial guidance based on published documentation. The workflow below is a suggested starting point, not a measured product result.
When to choose Locus
- Researchers and readers who search long pages and PDFs daily and want the relevant section found instantly instead of scanning every match.
- People who summarize and revisit documents, since Locus offers AI summarization and favorites saved from the sidepanel.
- Users who already pay for OpenAI access, since Professional supports bring-your-own GPT API key for unlimited use of OpenAI models.
When to choose something else
- Users who need unlimited documents and actions on the free tier, since Free is capped at 3 documents daily with daily limits on documents and AI actions.
- People who do not use Chrome, since Locus is presented as a Chrome extension with a sidepanel and extension icon.
A practical starting workflow
- Add Locus to Chrome and open any web page or PDF you want to search.
- Press the Locus shortcut and type what you are looking for; Locus understands the search and jumps to the relevant section.
- Use AI helpers and summarization on the page, and save useful matches as favorites from the sidepanel view.
- Sign up free to unlock additional functionality, or move to Professional for no document limits, newest AI models, and faster processing.
Check before committing
- Professional amounts on the homepage are shown in $ without a named currency, so no paid-tier charge fact is recorded; Professional also offers 14 days free on the monthly option and 30 days free on the annual option.
- OpenAI integration requires your own API key with a small credit balance, and your key does not leave the browser, according to the FAQ.
- Document data expires and is deleted after a set time depending on plan, except matches marked as favorites; Locus says it does not train models with your data.
Common questions
What is Locus?
A Chrome extension for smart search and AI on any web page: it reimagines Ctrl+F so you quickly find information, with AI helpers, summarization, and favorites.
Is Locus free?
Yes. The Free tier is $0 forever with 3 documents daily, smart search, AI helpers, web pages and PDFs, and saved favorites.
How does OpenAI integration work?
Locus use of OpenAI is strictly limited, so you use your own API key: create an OpenAI account, add a small credit with a 5 USD minimum, and generate a key that does not leave the browser.
How does Locus protect my data?
Locus says it stores no personal information, document data expires and is deleted after a set time by plan except favorites, and it does not train models with your data.
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Sources and checks
Last source review is not a date of product testing. No rating or test result is implied by inclusion. Check the current plan and terms before buying.