W
Webthumb
Webthumb screenshot service
About this crawler
Webthumb is a web crawler identified by the regular-expression pattern Webthumb in the User-Agent request header. It is categorised as seo. Use the regex above to detect, log, allow, or block Webthumb traffic in your web server, CDN edge rules, or robots.txt.
Block-rate · top 25k sites
No block-rate data for this crawler.
Technical details
- Name
- Webthumb
- Pattern
Webthumb- Tags
- seo
- Added
- 2026/05/09
- Instances
- 1 known sample(s)
Sample User-Agent strings
Mozilla/5.0 (Windows NT 6.3; WOW64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/30.0.1599.69 Safari/537.36 Webthumb/2.0
Block this crawler
robots.txt — disallow Webthumb:
User-agent: Webthumb
Disallow: /
Apache .htaccess — return 403:
RewriteEngine On
RewriteCond %{HTTP_USER_AGENT} Webthumb [NC]
RewriteRule .* - [F,L]
Nginx — return 403 inside a server block:
if ($http_user_agent ~* "Webthumb") {
return 403;
}
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