Wappalyzer
Technology profiler that identifies software on websites
About this crawler
Wappalyzer is a web crawler identified by the regular-expression pattern Wappalyzer in the User-Agent request header. It is categorised as seo. Use the regex above to detect, log, allow, or block Wappalyzer traffic in your web server, CDN edge rules, or robots.txt.
Block-rate · top 25k sites
0.065%
Technical details
- Name
- Wappalyzer
- Pattern
Wappalyzer- Tags
- seo
- Reference
- https://www.wappalyzer.com
- Added
- 2026/05/09
- Instances
- 3 known sample(s)
Sample User-Agent strings
Mozilla/5.0 (compatible; Wappalyzer; +https://github.com/AliasIO/Wappalyzer)
Mozilla/5.0 (compatible; Wappalyzer; https://www.wappalyzer.com)
Chrome/49.0.2623.87 (compatible; Wappalyzer; +https://github.com/AliasIO/Wappalyzer)
Block this crawler
robots.txt — disallow Wappalyzer:
User-agent: Wappalyzer
Disallow: /
Apache .htaccess — return 403:
RewriteEngine On
RewriteCond %{HTTP_USER_AGENT} Wappalyzer [NC]
RewriteRule .* - [F,L]
Nginx — return 403 inside a server block:
if ($http_user_agent ~* "Wappalyzer") {
return 403;
}
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