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JSON-LD with wrong value types and a relative context (deliberately invalid)

A deliberately invalid Recipe carrying six unambiguously wrong-typed values - a numeric datePublished, a prose prepTime where an ISO 8601 duration belongs, an object recipeYield, two non-numeric ratings and a misspelled @type - plus a relative @context that never resolves, an untyped image object and two ingredients crammed into one string. For testing the limits of type coercion.

File: JSON · Social · UTF-8
Use case: Web assetsJSON parsing+2· Conversion set

Matrix client discovery (m.homeserver)

The client-side twin of the Matrix delegation pair: homeserver and identity server base URLs plus an unregistered vendor key, which clients must carry through rather than reject. For testing discovery and unknown-member tolerance.

File: JSON · Well Known · 3 members
Use case: Web assetsJSON parsing+1· Paired fixture

Matrix server delegation (m.server)

The one-member server-delegation document that lets example.com host its Matrix homeserver at matrix.example.com:8448 without changing user IDs. For testing federation discovery and explicit-port handling.

File: JSON · Well Known · 1 member
Use case: Web assetsJSON parsing+1· Paired fixture

Minified CSS with an external source map

A minified stylesheet closing with the CSS form of the annotation, `/*# sourceMappingURL= */` - the comment syntax differs from JavaScript's and is a common reason a CSS map is silently ignored. For testing stylesheet source-map resolution.

File: CSS · Build Output
Use case: Web assetsCode parsing+1· Paired fixture

Minified JS bundle referencing an external source map

A one-line minified bundle built from two ES modules, ending in the `//# sourceMappingURL=` comment that points at the v3 map shipped beside it. For testing that a debugger, error reporter or bundler analyser follows the annotation and resolves the map relative to the bundle.

File: JS · Build Output
Use case: Web assetsCode parsing+1· Paired fixture

Minified JS bundle with an inline base64 source map

The same bundle with its v3 map embedded as a base64 data: URI in the sourceMappingURL comment - the single-file form dev builds emit. For testing that a tool decodes an inline map instead of trying to fetch it as a relative path.

File: JS · Build Output · base64
Use case: Web assetsCode parsing+1· Conversion set

mta-sts.txt (RFC 8461 SMTP MTA-STS policy)

An SMTP MTA-STS policy in enforce mode listing three MX patterns, one of them a wildcard, with a seven-day max_age. RFC 8461 specifies CRLF line endings, so this fixture is written with them deliberately - for testing policy parsers that split on bare LF.

File: TXT · Well Known
Use case: Web assetsConfig parsing+1· Conversion set

oauth-authorization-server metadata (RFC 8414)

A fully populated RFC 8414 authorization-server metadata document for a fictional issuer: seven endpoints including PAR, introspection and dynamic registration, PKCE and DPoP algorithm lists, and policy URIs. Distinct from the minimal OpenID configuration already in this category.

File: JSON · Well Known
Use case: Web assetsJSON parsing+1· Conversion set

Open Graph card (1200×630 PNG)

A 1200×630 Open Graph preview card at the exact og:image aspect ratio — for testing link-preview generators, social-card renderers, and image pipelines.

File: PNG · Social
Use case: Web assets· Conversion set

Plain-text sitemap (one URL per line)

The plain-text sitemap format the sitemaps.org protocol also accepts: one absolute URL per line, no markup, UTF-8 encoded. For testing that a crawler supports the text form as well as XML.

File: TXT · Crawlers · UTF-8
Use case: Web assetsWeb scraping+1· Conversion set

png

994 B

PNG — PWA Icon 192×192 Wave G

192×192 PWA icon SAMPLE for manifest icon pipelines.

File: PNG · Pwa
Use case: Web assets· Conversion set

png

2.3 KB

PNG — PWA Icon 512×512 Wave G

512×512 PWA icon SAMPLE for manifest icon pipelines.

File: PNG · Pwa
Use case: Web assets· Conversion set

png

994 B

PNG icon sprite (5-icon strip)

A 320×64 PNG icon sprite (five 64×64 cells) — the raster twin of the SVG sprite, for testing background-position sprite techniques and sprite slicers.

File: PNG · Sprites
Use case: Web assetsConversion testing· Paired fixture

PWA — app-shell.css SAMPLE

PWA shell fixture SAMPLE (app-shell.css) for offline app-shell testing.

File: CSS · Pwa
Use case: Web assets· Conversion set

PWA — index-shell.html SAMPLE

PWA shell fixture SAMPLE (index-shell.html) for offline app-shell testing.

File: HTML · Pwa
Use case: Web assets· Conversion set

PWA — offline.html SAMPLE

PWA shell fixture SAMPLE (offline.html) for offline app-shell testing.

File: HTML · Pwa
Use case: Web assets· Conversion set

PWA — sw-register.js SAMPLE

PWA shell fixture SAMPLE (sw-register.js) for offline app-shell testing.

File: JS · Pwa
Use case: Web assets· Conversion set

png

994 B

PWA icon (192×192 PNG)

A 192×192 PNG app icon referenced by the web app manifest (purpose 'any') — for testing PWA icon pipelines and manifest icon resolution.

File: PNG · Pwa
Use case: Web assets· Conversion set

png

2.3 KB

PWA icon (512×512 PNG)

A 512×512 PNG app icon referenced by the web app manifest (purpose 'any') — for testing PWA icon pipelines and manifest icon resolution.

File: PNG · Pwa
Use case: Web assets· Conversion set

png

2.1 KB

PWA maskable icon (512×512 PNG)

A 512×512 maskable PNG icon with the mark inside the central safe-zone and a full-bleed background — for testing maskable icon cropping across Android adaptive-icon shapes.

File: PNG · Pwa
Use case: Web assets· Conversion set

PWA Shortcut JSON — 01

PWA shortcut descriptor SAMPLE #1 for install UI tests.

File: JSON · Pwa
Use case: Web assets· Conversion set

PWA Shortcut JSON — 02

PWA shortcut descriptor SAMPLE #2 for install UI tests.

File: JSON · Pwa
Use case: Web assets· Conversion set

PWA Shortcut JSON — 03

PWA shortcut descriptor SAMPLE #3 for install UI tests.

File: JSON · Pwa
Use case: Web assets· Conversion set

PWA Shortcut JSON — 04

PWA shortcut descriptor SAMPLE #4 for install UI tests.

File: JSON · Pwa
Use case: Web assets· Conversion set