Web Push Subscriber Demo - Online Test Notifications
Request notification permission and create a push subscription. See the subscription object. Learn how web push works.
UD5 Toolkit
Online PWA Detection — Check what related apps your users already have installed
Click the button to detect installed related apps on this device using the getInstalledRelatedApps API. Use the switch to try a simulated demo.
| Platform | App ID | URL | Status |
|---|
related_applications field. It requires HTTPS and works mainly in Chromium browsers.
related_applications array to your manifest.json. Example:
{
"related_applications": [
{
"platform": "play",
"id": "com.example.app"
},
{
"platform": "webapp",
"url": "https://example.com/pwa"
}
]
}
Also link Android native apps via Digital Asset Links for the detection to work.
related_applications array. This is a privacy and security limitation to prevent fingerprinting.
Request notification permission and create a push subscription. See the subscription object. Learn how web push works.
Check notification permission, request it, and send a test notification. Verify icon, body, and tag. Debug web push.
See your current push subscription details. Trigger push and notificationclick events manually to debug.
Register a service worker, subscribe to push, and send a test notification using a VAPID key pair. Step‑by‑step demo.
See your current notification permission status. Request or reset it. Test browser notification behavior.
Enter an API URL and quickly check its HTTP status code and response time. See response headers and body. Browser fetch.
Create a passkey and authenticate using the Web Authentication API. Supports platform authenticators (TouchID, FaceID). No server.
Add appliances with typical wattage and hours/day to get weekly kWh and cost. Identify energy hogs.
Select a state and year to see all public holidays. Works offline with built-in data. Plan your long weekends. Simple reference tool.
Enter amount of kernels and see estimated popped volume. Plan movie night snacks perfectly.
Answer a few questions about travel, diet, and energy use to estimate your carbon footprint. Awareness tool.
Select your average daily meals and habits to see how much virtual water you consume. Environmental awareness tool.
Write a self-contract with a goal and reward/penalty. Sign digitally, save as image. Stay accountable.
Enter and track key body circumferences over time. See inch/centimeter changes and chart progress. Local storage.
Build good habits by tracking daily completions. Visualize streaks and progress. Pure browser storage keeps your habit data private and offline-capable.
Flip a coin and track your full history. See percentage of heads/tails and longest streak. Pure RNG, no bias.
Answer simple questions (color, size, beak shape) to narrow down common North American backyard birds. No photo needed.
Estimate calories burned for various activities like running, cycling, swimming based on duration and body weight. Informational and motivational.
Click to receive a random positive affirmation. Save favorites locally. A simple tool to boost your mood and mindset.
Track how many rolls you use per month. Input sheet count to find cost per sheet. Reduce waste.
Speak into the mic and see a live transcript with word count. Uses the Web Speech API. Nothing is stored.
Commit to 30 days of gratitude. Write 3 things each day, see progress. Data stays local. Mood boost habit.
Estimate body fat percentage using the US Navy circumference method or BMI-based formula. Private and instant, all data stays on your device.
Enter bowl diameter and depth to assess whisker stress risk. Get bowl recommendations. Feline wellness.
Calculate power supply and controller requirements for any length of LED strip (5050, 2835, WS2812B). Prevents overloading. Local only.
Answer a short questionnaire based on common deferral criteria (travel, medication, tattoos) to see if you may be eligible to donate blood. Educational only.
Measure your waist‑to‑hip ratio and learn about associated health risks. WHR interpretation. Educational only.
Enter heart girth measurement to estimate goat weight in pounds or kilograms. Simple farm tool.
Check your Body Mass Index using standard or metric units. Get a health category analysis instantly. Educational purpose only; data stays private.
Approximate monthly child support obligation based on both parents incomes and number of children. Uses simplified model for educational reference. Not legal advice.