PWA Checklist

Free online pwa checklist — shipping an installable PWA without missing a requirement.

100% Private — Runs entirely in browserInstant calculation & resultFree, no sign-up

Everything a Progressive Web App needs to be installable and reliable offline.

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Serve the site over HTTPSService workers require a secure context.Add a web app manifest with name, icons (192/512px), start_url, displayRequired for the install prompt.Register a service workerEnables offline and caching strategies.Precache the app shell; choose runtime caching per routeInstant repeat loads.Provide an offline fallback pageGraceful behavior with no network.Set theme_color and background_colorNative-feeling splash screen.Add apple-touch-icon and iOS meta tagsiOS ignores parts of the manifest.Test install on Android and desktop ChromeVerify beforeinstallprompt fires.Version your service worker and handle updatesStale caches are the #1 PWA bug.

Why follow ToolJiffy Progressive Web App (PWA) Checklist?

Progressive Web Apps (PWAs) combine the reach of the open web with the native app experiences of iOS and Android—including offline functionality, home screen installability, push notifications, and fast loading speeds. Meeting Google's PWA installability requirements requires configuring Web App Manifests, Service Worker caching strategies, and responsive app icons. ToolJiffy PWA Checklist provides an interactive developer roadmap in your browser.

Web App Manifest (manifest.json) Validation: Verifies name, short_name, display: "standalone", and start_url fields.
Service Worker Offline Caching Roadmap: Configures offline fallback pages, cache storage APIs, and background sync routines.
Adaptive Maskable Icon Guidelines: Details 192x192 and 512x512 PNG icon assets with 40% safe-zone margin for Android adaptive icons.
100% On-Device Local Storage State: Progress checkboxes save automatically in browser localStorage without server logins.

Progressive Web App Technical Specification Engine

ToolJiffy's checklist categorizes PWA requirements into core installability criteria, offline caching architecture, push notification setup, and iOS Safari compatibility steps.

Whether converting an existing web app into a PWA, building a modern React/Vite/Astro web application, or preparing for Lighthouse PWA audits, structured checklists ensure zero missed installability requirements.

Client-side security for private web app audits

Tracking PWA implementation progress for internal enterprise web apps or private SaaS products should never require logging data on remote servers.

ToolJiffy operates on a zero-cloud architecture. All checklist states remain 100% local in your browser tab. Your audit data never leaves your device.

Step-by-step guide to shipping an installable PWA

Configure manifest.json: Link a valid Web App Manifest file in your HTML <head> with display: "standalone" and icon arrays.
Register Service Worker: Register a Service Worker containing an active fetch event handler and offline cache storage.
Test PWA installability: Audit installability using Chrome DevTools Application tab and run Lighthouse PWA checks.

Frequently asked questions

How does the PWA Checklist work in browser memory?

ToolJiffy provides an interactive Progressive Web App (PWA) checklist covering Web App Manifest validation, Service Worker offline caching strategies, HTTPS requirements, maskable icon assets, and installability requirements.

What core requirements must a web app meet to be an installable PWA?

An installable PWA requires a valid Web App Manifest (`manifest.json`), registered Service Worker with fetch event handler, HTTPS SSL connection, and responsive mobile icons (192x192 and 512x512 with maskable purpose).

What is a Web App Manifest file (manifest.json)?

`manifest.json` defines how your web application displays when installed on a mobile or desktop home screen: `name`, `short_name`, `start_url`, `display` ("standalone"), `theme_color`, `background_color`, and `icons`.

Is my PWA audit progress uploaded to any cloud server?

No, 100% private. All checklist states are stored locally in your browser`s localStorage. Your progress never leaves your computer.

What Service Worker caching strategies are recommended for PWAs?

Common strategies include Cache-First (for static assets/images), Network-First (for API data), and Stale-While-Revalidate (for fast UI rendering with background update).

What are maskable PWA icons and why are they required on Android?

Android adapts PWA home screen icons into circles, squircles, or rounded rectangles. Maskable icons specify safe zone padding so background colors fill the adaptive icon shape.

Does PWA installation work on iOS Safari?

Yes! iOS Safari supports PWA installation via "Add to Home Screen", utilizing `` and touch icon links.

Is ToolJiffy PWA Checklist free without limits?

Yes! ToolJiffy is 100% free with unlimited usages, zero account sign-ups, and zero watermarks.

Explore related developer tools

Follow the Lighthouse Audit Checklist, follow the Mobile-Friendly Checklist, follow the Page Speed Optimization Checklist, or check manifest files with package.json Generator.