W3C Markup Validation Service is an automated web crawler and indexing bot (Validator).
| Operator | W3C |
|---|---|
| Category | Validator |
| User Agent | Platform | Device |
|---|---|---|
| W3C_Validator/1.767 | Unknown | Unknown |
| W3C_Validator/1.606 | Unknown | Unknown |
| W3C_Validator/1.591 | Unknown | Unknown |
| W3C_Validator/1.575 | Unknown | Unknown |
| W3C_Validator/1.555 | Unknown | Unknown |
| W3C_Validator/1.432.2.5 | Unknown | Unknown |
| W3C_Validator/1.432.2.22 | Unknown | Unknown |
| W3C_Validator/1.432.2.19 | Unknown | Unknown |
| W3C_Validator/1.432.2.10 | Unknown | Unknown |
| W3C_Validator/1.305.2.12 libwww-perl/5.64(Linux LLC 1.2) | Unknown | Unknown |
| W3C_Validator/1.3 libwww-perl/6.68 | Unknown | Unknown |
| W3C_Validator/1.3 http://validator.w3.org/services | Unknown | Unknown |
| W3C_Validator/1.3 | Unknown | Unknown |
| Validator.nu/LV https://validator.w3.org/services | Unknown | Unknown |
| Validator.nu/LV http://validator.w3.org/services | Unknown | Unknown |
| Validator.nu/3 | Unknown | Unknown |
| Validator.nu/LV | Unknown | Unknown |
| W3C_Validator/1.654 | Unknown | Unknown |
| W3C_Validator/1.305.2.12 libwww-perl/5.64 | Unknown | Unknown |