Free Facebook & Instagram Interest Finder

Use this free interest explorer to find hidden Facebook & Instagram ad targeting interests with real-time audience sizes from Meta's Marketing API.

Browse the full Facebook ad interests list by category

Free, no login required · Real-time data from Meta's API · Export results to CSV

How It Works

Enter a keyword

Enter a keyword related to your product, service, or target audience.

Review the interests

Review the matching interests, their audience sizes and category paths.

Export or build your audience

Export the results to CSV, or add the interests to Detailed Targeting in Facebook Ads Manager.

For example, searching “yoga” returns interests like Yoga, Bikram Yoga and Yoga as exercise, each with its own estimated audience size.

See the ads behind these interests

Eachspy's Facebook Ad Spy searches millions of live Facebook and Instagram ads from Shopify and ecommerce stores — filter by spend, duration, and landing page to find the products and angles that are actually winning.

Open the Ad Spy Dashboard

How to Find Hidden Facebook Interests

Many of the most valuable Facebook and Instagram targeting interests are “hidden” — they never show up in the Ads Manager dropdown. This interest finder queries Meta's Marketing API directly, so you can surface those hidden interests and audience segments by keyword and compare their audience sizes.

Targeting Tips

Combine broad and specific interests to balance reach and relevance
Use Facebook's Audience Overlap tool to avoid competing against yourself
Combine interests with lookalike audiences for enhanced targeting
A/B test different interest combinations to find top performers

Why Use This Free Interest Finder?

This free interest targeting tool connects directly to Meta's Marketing API for real-time audience data — no registration required. It's the fastest way to find Facebook and Instagram ad interests and size their audiences before you build a campaign.

Frequently Asked Questions

What is a Facebook interest finder?

It's a free tool that searches Meta's Marketing API by keyword and returns the Facebook and Instagram ad targeting interests that match, along with their estimated audience sizes.

Are these the same as hidden interests?

Yes. Many interests returned here never appear in the Ads Manager dropdown — they're often called "hidden interests." Pulling them straight from Meta's API surfaces options you can't browse manually.

Is it really free?

Yes, completely free with no login or registration. Run as many searches as you need and export the results to CSV.

Where does the audience data come from?

Directly from Meta's Marketing API, so audience size estimates reflect Facebook and Instagram's current targeting data.

How do I use these interests in Ads Manager?

Copy an interest name into the Detailed Targeting field when you build a Facebook or Instagram ad set, or export the full list to CSV first and pick the segments that fit your campaign.