Add the Firebase JSON key
Download a service account private key from Firebase Project settings, then upload or paste it into the tester.
Firebase Cloud Messaging HTTP v1
Free developer tool
FCMNotification Tester
Send a real Firebase push notification in seconds. Upload your service account JSON, paste a device token, add your title and message, then send.
FCM HTTP v1
No signup
One-device testing
Optional custom data
FCM Notification TesterWebsite → Firebase → Device
Service account JSONDevice tokenPush delivered
Send a test notificationEverything you need. Nothing you don’t.
Works with your Firebase appUse any valid FCM registration token from your client.
FlutterAndroidiOSWeb
How it works
From Firebase JSON to a test push in three steps
A focused workflow for testing real-device delivery with the current Firebase Cloud Messaging HTTP v1 API.
Paste the device token
Use the FCM registration token returned by your Android, iOS, Flutter, or web client.
Send the notification
Add a title, message, or optional custom data. The tool authenticates and sends through FCM HTTP v1.
A simple, reliable Firebase push notification tester for HTTP v1
FCM Notification Tester is built for developers who need a quick way to test Firebase Cloud Messaging without creating a Postman collection or writing a temporary backend script. The tester sends a notification to one FCM device token and supports optional custom data.
The old FCM legacy HTTP send API used a static server key. Modern Firebase sending uses the HTTP v1 API and OAuth 2.0 authorization. This tool reads the project ID and signing credentials from your Firebase service account JSON, mints a short-lived access token on the server, and sends the message to the FCM v1 endpoint for that project.
If a Firebase notification is not showing on your device, check the device registration token, app notification permissions, Android notification-channel setup, APNs configuration for Apple platforms, and the Firebase project associated with the token.
Developer guides
FCM testing references
Short practical guides for the most common Firebase notification testing tasks.
GuideHow to test an FCM notification online
From Firebase credentials to a real device test.
AuthenticationGet a Firebase service account JSON key
Where the JSON key comes from and how to handle it safely.
Device tokenHow to get an FCM registration token
Find the token your app needs for a single-device test.
HTTP v1FCM HTTP v1 API explained
Why legacy server keys were replaced by OAuth authorization.
FAQ
FCM notification tester questions
Does this use the old FCM legacy API?
No. The send flow uses Firebase Cloud Messaging HTTP v1 and a short-lived OAuth 2.0 access token created from the supplied service account credentials.
Where do I get the Firebase JSON file?
In Firebase Console, open Project settings, then Service accounts, and generate a new private key for a service account you are authorized to use.
What is the device token?
It is the FCM registration token generated by the Firebase Messaging SDK for an app installation. Paste that token into the tester to send to that device registration.
Can I send custom data with the notification?
Yes. Enter an optional JSON object in Custom data. FCM data values are sent as strings; non-string JSON values are serialized before the request is sent.