methodology / Modern Web / #67
Web App Manifest (manifest.json)
live factor #67 · Modern Web · scoring impl: implemented · weight 0.7%
What we measure
A Web App Manifest lets users "Add to Home Screen" on mobile, treating your site like a native app with its own icon and splash screen.
How to improve your score
Generate one with any PWA generator and link it from your `<head>` with `<link rel="manifest" href="/manifest.json">`.
Data source
Data source for this factor is not yet documented.
Implementation notes
Probe `/manifest.json` and parse the `<link rel="manifest">` href.
Scoring
Scoring formulas are versioned with the methodology. The current method (v1.1.0) maps raw measurements to pass, warn, fail. Factor weights determine how much each contributes to the composite — see the methodology index for the full table.
Version history
| Version | Change | Date |
|---|---|---|
| v1.1.0 | Factor introduced. Status: live. Scoring impl: implemented. | 2026-04-25 |