免費隨機 User-Agent 產生器
在測試代理、除錯爬蟲或模擬不同瀏覽器時，輪換 User-Agent 請求標頭會有幫助。Dokall 可為 Windows、macOS、Linux、Android、iOS 以及常見爬蟲產生真實的 UA 字串。
可按裝置類型及瀏覽器篩選，最多產生 50 條唯一字串，然後一鍵複製或下載 .txt 檔案。所有操作均在瀏覽器本地完成。
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.