--- title: "Web app manifest missing or incomplete (seo/manifest)" description: "seo/manifest: The manifest supplies install name, icons and colours for browsers and app surfaces." canonical: https://void-design.vercel.app/rules/seo/manifest lastModified: 2026-09-16 --- # Web app manifest missing or incomplete `seo/manifest` · severity **info** · category SEO · detected by `void seo` and `void audit` ## Why it matters The manifest supplies install name, icons and colours for browsers and app surfaces. ## How to fix it Add app/manifest.ts with name, short_name, start_url, display and 192/512 PNG icons. ## Example ```ts // app/manifest.ts import type { MetadataRoute } from 'next' export default function manifest(): MetadataRoute.Manifest { return { name: 'Acme', short_name: 'Acme', start_url: '/', display: 'standalone', background_color: '#ffffff', theme_color: '#0a0a0a', icons: [ { src: '/icon-192.png', sizes: '192x192', type: 'image/png' }, { src: '/icon-512.png', sizes: '512x512', type: 'image/png' }, ], } } ``` ## References - https://nextjs.org/docs/app/api-reference/file-conventions/metadata/manifest ## More seo rules `void seo` reports 60 rules in this category. What search engines need from the raw response: status codes, titles and descriptions in , self-referencing canonicals, one h1, crawlable links, Open Graph, icons, robots.txt and a sitemap with real dates. - `og-image-meta` og:image:width/height missing or wrong, or og:image:alt missing — [seo/og-image-meta](https://void-design.vercel.app/rules/seo/og-image-meta) - `twitter-card` twitter:card missing — [seo/twitter-card](https://void-design.vercel.app/rules/seo/twitter-card) - `favicon` No crawlable favicon in a Google-supported format — [seo/favicon](https://void-design.vercel.app/rules/seo/favicon) - `apple-touch-icon` apple-touch-icon missing or not a 180×180 PNG — [seo/apple-touch-icon](https://void-design.vercel.app/rules/seo/apple-touch-icon) - `theme-color` No theme-color meta — [seo/theme-color](https://void-design.vercel.app/rules/seo/theme-color) - `robots-txt-unreachable` robots.txt returns 5xx/429 or times out — [seo/robots-txt-unreachable](https://void-design.vercel.app/rules/seo/robots-txt-unreachable) - `robots-txt-missing` No robots.txt — [seo/robots-txt-missing](https://void-design.vercel.app/rules/seo/robots-txt-missing) - `robots-txt-invalid` robots.txt serves HTML, exceeds 500 KiB, or has unparseable lines — [seo/robots-txt-invalid](https://void-design.vercel.app/rules/seo/robots-txt-invalid) Detected by `void seo` and `void audit`. Explain it in a terminal: `void rules seo/manifest`