在浏览器地址栏中输入view-source:url，可以查看url页面的源代码。
view-source协议在IE和Safari的高版本中的支持被移除了，支持的浏览器见下。
| Browser | Supported? |
|---|---|
| Mozilla Firefox | supported |
| Mozilla SeaMonkey | supported |
| Netscape | supported |
| Internet Explorer 4, 5 and 6 | supported |
| Internet Explorer 6, 7, and 8 | not supported after Windows XP SP2 |
| Safari 3.2.1 | supported[citation needed] |
| Safari 5, 6 | not supported |
| Opera 7, 8, 9, 10, 11 | not supported |
| Opera 15 and up | supported |
| Google Chrome | supported[7] |
| Web | supported[citation needed] |
| HP webOS | supported in-browser via a homebrew app called Internalz Pro[8] |