With SnippetEditor, you can edit html/javascript code and see the results right away. It supports the standard console log to debug your script. This app is designed to be an offline tool where no internet connection is required. However you can also go online and see any sites's source code. While you are at it, you can modify its source code and see the changes right away!

Included are quick reference guides to HTML and CSS. Also a full reference guide to JavaScript.

Here is the list of things you could do:

1. Edit, Save, Email your code.
2. Complete Console log support for JavaScript
3. Example code for HTML5: canvas, video, editable content, localstorge.
4. Go to any website and modify their code then see the result.
5. Can use three different user agent, iphone/ipad/mac os, so that you can see different code from the sites that support all different devices.
6. Indent the code that's been minified.

Know issues:
1. When running modified code from a website, it will not work if it uses js with relative path to get data from the site. This is because I can't change these relative paths to absolute paths by looking at the code, these paths are generated dynamically.
2. The 10 seconds javascript run time limit imposed by webview will sometime cause crashes since it will just stop at random places of the code.