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Environment Variables

Nuxt VueFire automatically picks up a few environment variables to configure Firebase from your .env file. These usually take precedence over other options defined in nuxt.config.ts. They usually try to support the existing Firebase environment variables better.

Admin SDK

During development, if you are doing SSR, you must provide the GOOGLE_APPLICATION_CREDENTIALS environment variable with the path to the service account file. This is usually a JSON file you can download from the Firebase Console > Project Settings > Service Accounts > Generate new private key.


Ensure to exclude the .env and service-account.json files from your version control system. This variable will be automatically set on Firebase and Google Cloud deployments.


When deploying to something other than Firebase or Google Cloud, the GOOGLE_APPLICATION_CREDENTIALS environment variable must be set manually. Instead of setting it to the path of the service account file, you can set it to the content of the file itself. Note it will have to fit in one single line:

GOOGLE_APPLICATION_CREDENTIALS='{"type":"service_account","project_id":"...","private_key_id":"...","private_key":"-----BEGIN PRIVATE KEY-----\n[redacted]\n-----END PRIVATE KEY-----\n"}'


If you are using AppCheck, you can specify the FIREBASE_APPCHECK_DEBUG_TOKEN environment variable to use a debug token in development. This is useful in protected CI environments or if you run multiple Firebase projects on your machine and don't want to rely on the local generation of the debug token.


These can be generated on the Firebase Console > AppCheck > Apps > Manage Debug Tokens.

This variable will not be used in production unless debug: true is passed during a build or generate command. This allows you to still test locally using a debug token without worrying about accidentally deploying it to production.

Debugging utilities

You can activate these while developing or building locally by setting them before running the command:

  • VUEFIRE_APPCHECK_DEBUG=true will activate the AppCheck debug even in production.
  • VUEFIRE_EMULATORS=true will activate the Firebase Emulators even in production.

Released under the MIT License.