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Platform support & privacy

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TL;DR

  • Chrome, Edge, Firefox — full support on desktop and Android: title, body, banner image, click action.
  • Safari (macOS) — text only: no banner image, no action buttons.
  • iOS / iPadOS — web push exists only for installed PWAs (Add to Home Screen, iOS ≥ 16.4). A regular Safari tab cannot receive one.
  • Truncation is real. macOS shows about one line of body, Windows about two. Front-load your message; the composer previews each platform.
  • End-to-end encrypted. Push services (Google, Mozilla, Apple) relay ciphertext they cannot read.

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Per-platform behaviour

Write for the worst case: a title under 48 characters with the point in the first words, and a single-sentence body under 120 characters. The composer enforces these budgets with live counters and an OS-real preview for each platform.

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Privacy

Web push is one of the most privacy-preserving channels there is:
  • Payloads are end-to-end encrypted (RFC 8291). The message is encrypted with keys that exist only in the recipient’s browser and the Notifizz backend; Google’s, Mozilla’s and Apple’s push services see ciphertext.
  • Notifizz stores no message content in the clear at rest beyond what you see in your own delivery history, and never stores the subscription’s cryptographic keys unencrypted.
  • Subscriptions are anonymous capability URLs. They identify a browser’s push mailbox, not a person; Notifizz links them to the same user id you already use for the Notification Center — no new personal data is collected.
  • Deletion is honoured end to end. Erasing a recipient (GDPR) removes their subscriptions immediately.

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FAQ

Each OS renders notifications with its own layout and truncation rules — that’s outside anyone’s control. The composer’s platform switcher shows the exact rendering per OS before you ship.
Only if your product is installed as a PWA (Add to Home Screen) on iOS 16.4 or later. For a regular mobile web audience, treat web push as a desktop/Android channel and keep email or the Notification Center as the fallback for iOS.
Notifizz composes and encrypts the payload server-side to deliver it — the content is yours and appears only in your dashboard’s delivery history. The transport (browser push services) never sees it in the clear.