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JSHint is a tool to detect errors and potential problems in JavaScript code.

Now Anyone can test your Javascript code by online Free Javascript Editor Tool. Javatpoint added a new feature in his javascript tutorial for beginners.

JSLint takes a JavaScript source and scans it. If it finds a problem, it returns a message describing the problem and an approximate location within the source. The problem is not necessarily a syntax error, although it often is. JSLint looks at some style conventions as well as structural problems. It does not prove that your program is correct. It just provides another set of eyes to help spot problems.

As the first online Regular Expression tester to offer realtime highlighting and offering more languages than any other online tester, ReJAx continues to be the coolest and easiest to use Regular Expression tester on the web. Supported languages:
    * JavaScript
    * PHP 5 PCRE
    * PHP 5 POSIX
    * Ruby - BETA!!
    * PERL 5
    * UNIX Shell Pattern
It is not necessary to enter the beginning and ending slashes in the pattern field. Not all modifiers will be compatible with every language. Backreferences (when available) are usually in the form of \n where n is the reference number

JavaScript Beautifier formats JavaScript source code to make it easier to read and understand.

In this set of free web applications for web developers, we've included some incredibly nice resources, and also web applications that even blew me away. Javascript compressors, Wordpress theme creator, an extremely nice form generator service, Myspace theme creator and more.

Encoding/Decoding Escape/Unescape These scripts are intended to explain how to "hide" HTML and/or javascript from other people who view your page's source code. It is not foolproof, but it does make it more difficult to read and understand the source code. Due to the nature of how these scripts work, the explanation may seem complicated and drawn out, but be patient and it should make sense once you gain a little experience with them. You don't really have to know the ins-and-outs of these scripts, but it does help you understand how and why they work. So, take a seat and I'll do my best to make this seem as un-complicated as possible.

Minimal: original algorithm but keep linefeeds if single - Conservative: original algorithm - Agressive: remove more linefeed than the original algorithm but can be regressive

Reflection.js works well with logos, icons and dynamic image content such as forum avatars. Reflection.js comes into it's own with forum avatars; you can apply a reflection effect to every avatar on your forum or blog without any additional server work.

This beautifier can process your messy or compacted javascript, making it all neatly and consistently formatted and readable. You can always see the latest version of the code in github, and you can download the beautifier for local use (zip, tar.gz) as well.

Build-time error reporting, refactoring and code completion in Visual Studio Extended JavaScript syntax power with C# language features Pure client-side control library coded in C#

Convert a RSS or Atom-based feed into RSS, Atom and/or HTML and JavaScript Merge/splice several RSS or Atom-based feeds into one combined RSS and/or Atom feed Put an RSS feed (or merged feed) on your webpage using an IFrame or JavaScript)

* Convert a RSS or Atom-based feed into RSS, Atom and/or HTML and JavaScript * Merge/splice several RSS or Atom-based feeds into one combined RSS and/or Atom feed * Put an RSS feed (or merged feed) on your webpage using an IFrame or JavaScript) Optionally, you can also register to get a personalized page where you can keep track of your merged feeds.

visualize regular expressions simply