This reference guide lists the settings and style properties defined in the theme.json schema. See the theme.json how to guide for examples and guide on how to use the theme.json file in your theme.
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HTTP/2 200
server: nginx
date: Wed, 23 Jul 2025 15:17:42 GMT
content-type: text/html; charset=UTF-8
vary: Accept-Encoding
x-olaf: ⛄
link: ; rel="alternate"; title="JSON"; type="application/json"
link: ; rel=shortlink
x-frame-options: SAMEORIGIN
content-encoding: gzip
alt-svc: h3=":443"; ma=86400
x-nc: MISS ord 1
Theme.json Reference – Block Editor Handbook | Developer.WordPress.org