Push Notification Debugger
macOS / developpeurs
Push notifications failing? This macOS app helps you send, test, and debug APNs and Firebase Cloud Messaging notifications directly from your development setup.
Inspect error responses, validate payloads, test device tokens, and diagnose delivery issues faster with support for APNs and FCM.
The app supports APNs with P8 keys and P12 certificates, custom JSON payloads, and direct configuration of APNs HTTP/2 headers such as Push Type, Priority, Expiration, and Collapse ID.
It also supports Firebase Cloud Messaging via the FCM HTTP v1 API, including modern authentication with Google service accounts and OAuth-based configurations.
APNs and FCM error responses are presented clearly, helping you diagnose invalid payloads, expired credentials, bad device tokens, unregistered devices, topic issues, and other delivery failures faster.
Built for iOS and macOS developers who need fast, reliable push notification debugging without third-party servers, relay services, or extra setup.
Quoi de neuf dans la dernière version ?
You can now configure APNs HTTP/2 headers directly from the editor sidebar, so there is no more guesswork about which values the gateway expects. Choose the correct Push Type for your notification, including alert, background, voip, liveactivity, complication, and more. Set the Priority to 10 for user-visible alerts or 5 for power-efficient background pushes. Use Expiration to define a Unix timestamp after which APNs should discard the notification if the device is unreachable. Set it to 0 to discard it immediately. Use Collapse ID to group multiple notifications so that only the most recent one is delivered.
APNs error responses now also include a plain English explanation alongside the raw reason code. That means errors like BadDeviceToken, Unregistered, TopicDisallowed, and more than 25 other codes are easier to understand, so you can quickly see what went wrong and how to fix it.
