User agent parser — browser, OS, and device breakdown (local)
Paste a User-Agent header or log line to see structured browser, OS, device, engine, CPU, and bot fields. Copy JSON or individual values — regex parsing runs only in your tab.
Frequently asked questions
No. User-Agent parsing runs only in this tab with bundled regex rules—no external UA database. Nothing is sent to LocalTools servers for processing.
It covers common desktop, mobile, and bot patterns (Chrome, Safari, Firefox, Edge, Android, iOS, Googlebot, etc.). Privacy-hardened, frozen, or custom UAs may omit fields.
Yes—click “This browser” to load `navigator.userAgent` from the active tab without sending it anywhere.