webmanifest298 B

Web app manifest - minimal installable set

The smallest manifest that still satisfies a browser's install criteria: name, start_url, a standalone display mode and two PNG icons, with every optional member left out. For testing installability checks against the floor rather than a fully populated document.

Web assets JSON parsing Schema validation

Preview — first 18 lineswebmanifest

{
  "name": "Example Minimal",
  "start_url": "/",
  "display": "standalone",
  "icons": [
    {
      "src": "/icons/icon-192.png",
      "sizes": "192x192",
      "type": "image/png"
    },
    {
      "src": "/icons/icon-512.png",
      "sizes": "512x512",
      "type": "image/png"
    }
  ]
}

Specifications

Seed: 70400
Site: example.com (fictional)
Format: W3C Web App Manifest
Members: 4
Icons: 2
Installable: true

Testing contract

Expected to pass

Scenario: Run an installability check against a manifest with no optional members.
Expected result: The app is reported installable: name, start_url, display and a 192 px plus a 512 px icon are all present, and absent members like id, scope and theme_color produce warnings at most.

What is a .webmanifest file?

A web app manifest (.webmanifest) is a JSON file that describes a Progressive Web App to the browser, declaring its name, icons, theme colors, start URL, and display mode. It enables installation to a device home screen and standalone launching. It is linked from HTML via a manifest link element.

How to use this file

Use an example webmanifest to test PWA installability, manifest JSON parsing, icon and display-mode handling, and browser or auditing tools like Lighthouse.

How to use this file for testing

“Web app manifest - minimal installable set” is a deterministic Novus Examples fixture for Web assets, JSON parsing, Schema validation. Favicons, web app manifests, service workers, robots and sitemap files, Open Graph images, and .well-known resources — for testing web tooling, crawlers, PWA installers, and asset pipelines.

Documented properties for this file: seed 70400 · W3C Web App Manifest. Compare results against paired or grouped companions on this page when present (clean↔damaged, searchable↔scanned, or format twins) so scores stay reproducible across runs.

Download the file once, keep the path stable in CI or local scripts, and treat the spec table as the contract: dimensions, seeds, field lists, and roles are intentional. Corrupt or invalid samples are labelled as such — expect parsers to fail loudly rather than silently accept them.

Web-platform fixtures are standards-compliant samples against fictional example.com data. Test crawlers, PWA installers and manifest validators, favicon/icon pipelines, service-worker registration, or .well-known parsers against the documented structure.