Nitro
NitroPack speed optimization crawler
About this crawler
Nitro is a web crawler identified by the regular-expression pattern Nitro- in the User-Agent request header. It is categorised as seo. Use the regex above to detect, log, allow, or block Nitro traffic in your web server, CDN edge rules, or robots.txt.
Block-rate · top 25k sites
0.33%
Technical details
- Name
- Nitro
- Pattern
Nitro-- Tags
- seo
- Reference
- https://knownagents.com/agents/nitro
- Added
- 2026/04/26
- Instances
- 2 known sample(s)
Sample User-Agent strings
Mozilla/5.0 (compatible; Nitro-; +https://www.nitropack.io/)
Mozilla/5.0 (Linux; Android 15; GEC77) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/131.0.0.0 Mobile Safari/537.36 Nitro-Optimizer-Agent
Block this crawler
robots.txt — disallow Nitro:
User-agent: Nitro
Disallow: /
Apache .htaccess — return 403:
RewriteEngine On
RewriteCond %{HTTP_USER_AGENT} Nitro- [NC]
RewriteRule .* - [F,L]
Nginx — return 403 inside a server block:
if ($http_user_agent ~* "Nitro-") {
return 403;
}
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