Sitemap lastmod ISO 8601 Validator
Paste a sitemap.xml and detect <lastmod> values with invalid format (W3C Datetime/ISO 8601), dates in the future or too old. Lists URLs by status.
O que conta como lastmod válido?
A spec do sitemap.xml exige o formato W3C Datetime, um subset do ISO 8601: YYYY, YYYY-MM, YYYY-MM-DD, YYYY-MM-DDThh:mmTZD, YYYY-MM-DDThh:mm:ssTZD ou com fração de segundos. TZD é obrigatório quando há horário e pode ser Z ou ±hh:mm. Datetimes sem TZD (2026-05-21T14:30:00) são inválidos.
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