Developer Tools

User Agent Checker

A user agent checker displays the HTTP User-Agent header your browser sends — essential when debugging CDN rules, mobile layouts, or bot blocks.

How to use this user agent checker tool

Load the page — your user agent appears automatically.
Copy the full string for bug reports or .htaccess rules.
Toggle responsive mode in devtools and refresh to see mobile UA variants.
Check parsed browser name and version if shown.
Pair with browser information for fingerprint context.

About this user agent checker tool

A user agent checker displays the HTTP User-Agent header your browser sends — essential when debugging CDN rules, mobile layouts, or bot blocks.

Copy the string into tickets for SaaS vendors who whitelist enterprise browsers.

Compare desktop vs mobile UA after responsive redesigns.

Support tickets often need what is my user agent — this user agent checker copies the exact string servers log.

Why use VSPIC for user agent checker?

Instant UA without digging into browser about pages.
Parsed breakdown for non-experts.
Developer-friendly copy button behavior if available.
Free user agent checker on VSPIC.
Links to header checker for full HTTP context.

What is user agent checker?

The User-Agent request header identifies client software. Format is standardized loosely — many sites still sniff it despite Client Hints.

Bots and crawlers use distinctive UAs; blocking outdated IE UAs remains common.

Spoofing UA is possible in devtools — not a security boundary.

Privacy-focused browsers send reduced hints or generic strings.

Support tickets often need what is my user agent — this user agent checker copies the exact string servers log.

Mobile layout bugs frequently trace to unexpected user agent overrides in WebView apps — compare with desktop here.

Bots spoof Chrome user agent strings; do not trust user agent checker alone for crawler verification.