PWA installability check
Manifest icon validator
Paste or open a web app manifest to check icon sizes, sources, maskable coverage, app names, and display mode. Parsing happens entirely in your browser.
Paste manifest.json
What a robust icon array contains
Include at least 192×192 and 512×512 PNG icons. Keep an ordinary purpose=any version for full artwork and a purpose=maskable version with a full-bleed background and important content inside the safe zone. Every src must resolve relative to the manifest URL.