Paste a User-Agent string, get the browser (with version), rendering engine, operating system and device class — plus crawler detection: Googlebot, Bing, Baidu, AI crawlers (GPTBot, ClaudeBot), headless browsers and CLI clients are all recognized.
Pure regex, no library and no lookup-table download; the classification runs live as you type.
Frequently asked questions
How reliable is UA parsing?
For honest browsers, very. But UA strings are trivially spoofable, and browsers are freezing them into a few generic shapes — treat the result as a hint, never as identity or security.
Why does my browser show as Chrome?
Edge, Opera, Samsung Internet and many others are Chromium underneath — the parser prefers the actual brand token (Edg/, OPR/) when present.
中文说明
粘贴 User-Agent 字符串，解析浏览器（含版本）、渲染引擎、操作系统与设备类型——外加爬虫识别：Googlebot、必应、百度、AI 爬虫（GPTBot、ClaudeBot）、无头浏览器与命令行客户端均可识别。
纯正则实现，无需库和查找表下载；输入即实时分类。
常见问题
UA 解析可靠吗？
对诚实的浏览器很可靠。但 UA 字符串极易伪造，且各浏览器正把它冻结成少数通用形态——把结果当线索，别当身份或安全依据。
为什么我的浏览器显示为 Chrome？
Edge、Opera、三星浏览器底层都是 Chromium——解析器会优先认品牌标识（Edg/、OPR/），存在时显示真实品牌。