Web App Manifest Validator
Ensure your PWA manifest contains all required fields and uses proper formatting.
Manifest Validator
Enter a URL to fetch, parse, and grade its Web App Manifest against industry standards.
We will perform a deep dive on the manifest file structure, requirements, and PWA viability.
Why validate your manifest?
If your manifest.json is missing key properties or contains invalid JSON, browsers won't recognize your site as a Progressive Web App. This means users won't get the "Add to Home Screen" prompt, and your app won't be installable.
Required fields
- name or short_name: Used for the home screen icon label and install prompt.
- start_url: The URL that loads when the user launches the app from their home screen.
- display: How the app looks when launched (e.g.
standaloneorfullscreen). - icons: An array of image objects specifying the icons for the home screen and splash screen.
Related Guides
Deepen your understanding with our expert articles.