HTTP/2 200 server: nginx/1.18.0 (Ubuntu) date: Tue, 30 Dec 2025 14:54:47 GMT content-type: text/html;charset=utf-8 accept-encoding: gzip access-control-allow-origin: * access-control-allow-headers: content-type last-modified: Thu, 01 Jan 1970 00:00:00 GMT vary: Accept-Encoding, User-Agent content-encoding: gzip strict-transport-security: max-age=31536000; includeSubDomains; preload

This tool is an ongoing experiment in better HTML checking, and its behavior remains subject to change

Validator.nu (X)HTML5 Validator (Living Validator)

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