NotMyNet

Wondering if your Internet connection is to blame or not? NotMyNet is the free, local-first solution for proving your connection is stable (or not)!

Use Cases

• Check whether a known internet endpoint is reachable from a workstation over time.
• Monitor a local gateway, internal HTTP service, or router UI endpoint from a laptop on a LAN.
• Keep a rolling visual history of latency and outages while working from unstable networks.
• Export monitor definitions and history from one browser profile and import them elsewhere.

Features

• Installable PWA
• Offline app shell
• Local monitor configuration
• HTTP(S) probe type
• Rolling window visualization
• Current state, streak, duration, average, worst
• JSON export/import
• Multiple monitors
• Basic settings

Principles

• Local-first: all core logic, storage, and rendering happen in the browser.
• Offline-first: app shell and existing data must remain usable without internet access.
• Transparent: the UI must clearly distinguish browser limits from real target failures.
• Deterministic: metrics should be reproducible from stored samples.
• Extensible: probe types should use adapters so future browser-compatible checks can be added.

Core User Stories

• As a user, I can install the app and reopen it offline.
• As a user, I can create a monitor that checks an HTTP(S) endpoint on an interval.
• As a user, I can see whether the target is currently online, degraded, or in outage.
• As a user, I can see the last N probe results in a colored rolling window.
• As a user, I can configure the rolling window size, defaulting to 60.
• As a user, I can see the current streak and how long the current state has lasted.
• As a user, I can see rolling average latency, rolling worst latency, and all-time worst latency.
• As a user, I can save all settings locally and keep them across reloads.
• As a user, I can export my monitors and settings as JSON.
• As a user, I can import a JSON file to restore monitors and settings.

Tech Stack

• Astro for the app shell and UI composition.
• TypeScript throughout.
• Bun for package management, scripts, and local tooling.
• Ky for HTTP probe execution.
• IndexedDB for local persistence.
• Service Worker for offline app shell, installability and multi-tab coordination.