免费随机 User-Agent 生成器
在测试代理、调试爬虫或模拟不同浏览器时，轮换 User-Agent 请求头会很有帮助。Dokall 可为 Windows、macOS、Linux、Android、iOS 以及常见爬虫生成真实的 UA 字符串。
可按设备类型和浏览器筛选，最多生成 50 条唯一字符串，然后一键复制或下载 .txt 文件。所有操作均在浏览器本地完成。
Frequently Asked Questions
What is a User-Agent string?
The User-Agent is an HTTP header that identifies the client software making a request - browser name, version, operating system, and rendering engine. Servers use it for analytics, content adaptation, and bot detection.
Why would I need a custom User-Agent?
Testing how your website or API responds to different browsers, bypassing basic bot detection during development, scraping with browser-like headers, and debugging mobile vs desktop rendering all require specific User-Agent strings.
What browsers and devices are included?
Dokall includes presets for Chrome, Firefox, Safari, Edge, Opera on Windows, macOS, Linux, Android, and iOS. Each preset uses a current, realistic User-Agent string matching real browser releases.
Can I create a completely custom User-Agent?
Yes. Edit the generated string manually or build one from scratch. The tool provides realistic templates as starting points. Custom strings are useful for testing server-side User-Agent parsing logic.
Does changing User-Agent make me anonymous?
No. User-Agent is one of many fingerprinting signals. Your IP address, cookies, TLS fingerprint, and browser APIs still identify you. Changing User-Agent alone does not provide anonymity or bypass sophisticated bot detection.