Free Chrome Extension

Inspect & test feature flags.
Any page.

FeaturePeep reveals every client-side feature flag active on the current page, any environment, and lets you test them instantly. No dashboards, no source code, no friction.

Pending Chrome Web Store Approval See How It Works

app.yourproduct.com

FeaturePeep

LaunchDarkly

new-checkout-flow BOOL true

max-items-shown NUM 25

theme-config JSON {...}

ai-suggestions BOOL false

Works with your flag provider

LaunchDarkly

PostHog

OpenFeature

Optimizely

Split Coming soon

Unleash Coming soon

Statsig Coming soon

Everything you need to debug flags fast

Built for engineers and QA analysts... and anyone who's been this person:

Dave Henderson 12:32 AM

Wtf, is the feature flag on in prod yet!?

Instant Visibility

See every feature flag active on the current page the moment you open the panel. No source code access or environment variables required.

Real-Time Toggling

Flip any flag on or off and watch the page react instantly. Works with providers that stream updates via SSE or WebSockets — polling-based providers will need a manual refresh.

Providers

Compatible with LaunchDarkly, PostHog, Optimizely, and anything built with OpenFeature. Additional provider support is being added weekly. Don't see yours? Submit a request.

Search & Filter

Filter through hundreds of flags by name in milliseconds. Find exactly what you're looking for without scrolling through noise.

Stays Local

Overrides are stored locally in your browser. Nothing is sent to a server. Your flag state is yours alone.

Zero Config

Install and go. No API keys, no SDK setup, no instrumentation needed. FeaturePeep works with what's already on the page.

Up and running in 30 seconds

Install the extension

Add FeaturePeep from the Chrome Web Store in one click.

Open any page

Navigate to any site — your app, staging, or production.

Inspect & toggle

Click the FeaturePeep icon to see all flags and flip any of them instantly.

Inspect & test feature flags. Any page.