Test service worker registration, cache API, and offline functionality. Verify service worker lifecycle, test caching strategies, and check offline capabilities. Essential for Progressive Web App (PWA) development and offline functionality.
Service workers enable websites to work offline by caching resources and intercepting network requests. They can cache entire websites, enabling instant loading and offline access. PWAs use service workers to provide app-like experiences, with some apps achieving 90%+ cache hit rates for instant loading. This tester helps you verify service worker functionality and caching effectiveness.
Start with the live tester below. Supporting details, FAQs, and troubleshooting guidance are placed after the tool so the main action is easier to find and use immediately.
Test service worker registration, cache API, and offline functionality.
Common problems
If the live tester does not behave as expected, these are the first checks most users should try before assuming the hardware is broken.
Test service worker registration
Check cache API functionality
Test offline capabilities
Verify caching strategies
Test service worker registration, cache API, and offline functionality. Verify service worker lifecycle, test caching strategies, and check offline capabilities. Essential for Progressive Web App (PWA) development and offline functionality.
Service workers enable websites to work offline by caching resources and intercepting network requests. They can cache entire websites, enabling instant loading and offline access. PWAs use service workers to provide app-like experiences, with some apps achieving 90%+ cache hit rates for instant loading. This tester helps you verify service worker functionality and caching effectiveness.
Test your keyboard input, detect dead keys, and verify all keys are working correctly.
Test mouse buttons, scroll wheel, pointer tracking, and touch input.
Test your microphone input levels in real-time. Verify microphone is working.
Test your speakers or headphones with reference tones.
Helpful questions
Use these answers to understand results, browser limitations, permissions, and sensible next troubleshooting steps.
Open the live service worker test on this page and follow the prompts shown in the tester area. The tool runs directly in your browser, so you can check your device without installing additional desktop software or signing in.
Check browser permissions, confirm the device or browser feature is enabled, and reload the page if needed. Many browser-based testers depend on permission prompts, secure context support, or hardware access that must be approved before the test can run fully.
PWA development - test service worker functionality. It can help you confirm whether the issue is caused by the hardware itself, a browser permission setting, or a system configuration problem before you spend more time debugging.