Viber

social-preview Viber

Viber messaging web crawler bot

About this crawler

Viber is a web crawler identified by the regular-expression pattern Viber in the User-Agent request header. It is categorised as social-preview. Use the regex above to detect, log, allow, or block Viber traffic in your web server, CDN edge rules, or robots.txt.

Block-rate · top 25k sites

0.065%
latest snapshot
2026-06-04
matched key: Viber/18.3.2.0
2026-05-012026-06-040.11%

Technical details

Name
Viber
Pattern
Viber
Tags
social-preview
Reference
https://www.viber.com/
Added
2021/04/27
Instances
1 known sample(s)

Sample User-Agent strings

Viber

Block this crawler

robots.txt — disallow Viber:

User-agent: Viber Disallow: /

Apache .htaccess — return 403:

RewriteEngine On RewriteCond %{HTTP_USER_AGENT} Viber [NC] RewriteRule .* - [F,L]

Nginx — return 403 inside a server block:

if ($http_user_agent ~* "Viber") { return 403; }
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