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Set up the Local Emulator Suite Stay organized with collections Save and categorize content based on your preferences.

The Firebase Emulators make it easier to fully validate your app's behavior and verify your Firebase Security Rules configurations. Use the Firebase Emulators to run and automate unit tests in a local environment.

Preview: Some of the Firebase Emulators are in Preview. These products might change in backward-incompatible ways and are not subject to any SLA or deprecation policy.

Install the Firebase Emulators

Before you begin make sure you have installed the Firebase CLI and configured the Firebase Local Emulator Suite

Start the emulator using the following command. The emulator runs during all your tests.

Cloud Firestore 

 firebase emulators:start --only firestore

Realtime Database 

 firebase emulators:start --only database

Cloud Storage 

 firebase emulators:start --only storage

Set up tests and run the emulator

Now that you've installed the emulator, set up tests and generate reports to validate your rules' behavior before you deploy them to production.

Quickstart

For a few basic test cases with simple rules, try out the testing quickstart.

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Last updated 2026-08-19 UTC.

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