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Jasob JavaScript Obfuscator 3.5.1


Jasob JavaScript Obfuscator 3.5.1

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Jasob JavaScript Obfuscator 3.5.1 Ranking & Summary

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User Review: 0 (0 times)
File size: 5.87 MB
Platform: WinXP,Windows2000,Windows2003,Windows Vista S
License: Shareware
Price: $199.00
Downloads: 33
Date added: 2009-06-03

Jasob JavaScript Obfuscator 3.5.1 description

Jasob JavaScript Obfuscator 3.5.1 is a well-known tool, allowing JavaScript and CSS driven Web pages to be compressed and obfuscated into supertight, bandwidth-optimized code, which is hardly possible for hackers to steal and reverse engineer. JavaScript is scripting programming language used in millions of Web pages worldwide. Scripting languages are not compiled, so JavaScript source code has to be downloaded together with the Web page in order to be run by the Web browser. This has several drawbacks and the most important one is that JavaScript source code can be easily viewed by anyone. All it takes is to open the Web page in the Web browser and to choose option View Source. This means that anyone can steal your JavaScript code, modify it and reuse it for his own purposes.

When the code is not optimized, it takes the page longer to load. Besides, it makes the Web code easy to steal. Jasob JavaScript Obfuscator software is a perfect solution for those who want to make their Web pages faster and safer. Offering such compression technologies as comment removal, whitespace stripping, newline stripping and variable substitution, Jasob JavaScript Obfuscator can reduce the overall size of the code by 70%, making Web pages extremely quick to load and run in browsers. Obfuscated code also becomes impossible for hackers to understand and re-use.

The mechanism of obfuscation is very simple. Jasob JavaScript Obfuscator parses files with JavaScript code and replaces descriptive variable and function names, such as Customer, Salary, First Name with meaningless names: d, g, m. It also removes comments and unnecessary whitespace characters (space, tab, carriage return, line feed). The functionality of the code remains the same but source code changes dramatically. The same mechanism is used to compress and protect Cascading Style Sheet code (CSS).

Jasobs compression engine is equipped with language syntax, statement and keyword awareness and it optimizes code faultlessly even without breaking sloppy code with intermittent semicolon usage and other common errors.

With Jasob JavaScript Obfuscator your JavaScript code will become impossible to understand thus preventing anyone to steal and modify it. Its size will typically shrink for around 70% which will significantly improve download time and execution speed in the Web browser. How Jasob achieves this? Jasob reads files with JavaScript code and replaces descriptive variable and function names like Customer, Salary, FirstName... with meaningless names like d, g, m... It also removes comments and unnecessary white space characters (space, tab, carriage return, line feed). The functionality of the code remains the same while source code changes dramatically. This process is called JavaScript obfuscation, and the tool is called JavaScript obfuscator. Obfuscated code is impossible to reverse-engineer and extremely hard or impossible to understand. Jasob also handles Cascading Style Sheet (CSS) code in a similar fashion as JavaScript code and also removes white space characters and comments from non-JavaScript/CSS code (like from HTML code). Along with other features, this makes Jasob a complete solution for Web content optimization. Distribute obfuscated version of your Web content and keep your original source code for yourself!

Major Features:

  1. There are many sources where JavaScript and CSS code could be found. Jasob is capable of reading JavaScript/CSS code from the following file types:
    • JavaScript Files (.js)
    • HTML Files (.htm, .html)
    • XHTML Files (.xht, .xhtm, .xhtml)
    • Server Side Includes Files (.shtm, .shtml)
    • ASP Files (.asp)
    • ASP.NET Files (.aspx, .ascx)
    • ATL Server Files (.srf)
    • PHP Files (.php, .php3, .php4, .php5)
    • JSP Files (.jsp, .jspf)
    • JSP Document Files (.jspx)
    • XML Files (.xml, .xsd)
    • XSLT Files (.xsl, .xslt)
    • Cold Fusion Files (.cfm)
    • ePerl Files (.iphtml)
    • CSS Files (.css)
  2. Rules for JavaScript/CSS code blocks for various sources can be customized.
  3. There are JavaScript and CSS names that can't be changed in the process of obfuscation. For example, reserved words or properties like while or lastIndex can't be changed. Those names are called system names and they can be customized.
  4. When opening files, Jasob can open a single file, multiple files, the Jasob project or the whole Web site. The Jasob project consists of an arbitrary number of files. When opening the Web site, Jasob goes through all files in the selected folder and all its subfolders while opening only files of a supported file type. When saving the obfuscated Web site, Jasob saves obfuscated files to the obfuscated Web site folder and copies all other files (unsupported file types) from the original Web site folder to the obfuscated Web site folder thus preserving original Web site folder structure in the obfuscated Web site folder. Individual file settings and name changes are saved with the Jasob project or with Web site settings.
  5. The file viewer shows the selected project file content. Depending on the currently selected tab at the top of the file viewer, source or obfuscated file content is displayed. Syntax highlighting is applied to the file content to make it more readable. Syntax highlighting colors can be customized. You can search for text, go to the specified line and character number or use bookmarks. Also, you can easily highlight selected name(s) occurrences in the file viewer and navigate to those occurrences. Navigating from name occurrence in the source file content to the same name occurrence in the obfuscated file content and vice versa is also possible.
  6. In JavaScript, you can place JavaScript code inside strings and also have strings that contain plain text. Therefore, in the process of obfuscation it might be necessary to obfuscate name occurrences in certain strings but not in the others. Jasob provides great support for name occurrences in strings, allowing you to decide which particular name occurrence you wish to mark for obfuscation.
  7. When obfuscating files, there is often a need to work on a specific set of names than on all those names in name lists. The names bag provides support for working with a specific set of arbitrary names. You can then apply changes from names in the names bag to names in name lists, or update names in the names bag with data from names in name lists. You can also add comments to the names bag, open it, or save it to the file.
  8. Dynamic Web pages are Web pages that are created dynamically (on-the-fly) on the server upon each request for a Web page. Some of the Web technologies for creating dynamic Web pages include ASP, PHP, ASP.NET...
  9. An optional command-line interface enables you to automate obfuscation tasks.


  • Jasob configuration files are now in XML format.
  • The Jasob project and Web site settings files have changed to XML format and now contain all data relevant for the obfuscation, including system names, file types, definitions for elements and attributes that contain Javascript/CSS code... allowing you to fully customize your projects or Web site settings (like when obfuscating Firefox Extensions, Vista Gadgets or any other project). With new Jasob project and Web site settings file formats you can simply copy your Jasob project or Web site settings file along with your source files to another computer where Jasob is installed and continue working on them.
  • Use recent files lists to quickly access files you were working with before.
  • Context sensitive help and tool tips on File Settings and File Types dialogs make it even easier to use Jasob.
  • Fixed bug with # character which prevented jQuery expressions from being obfuscated correctly.
  • All known issues have been fixed.

Requirements: Windows 2000/XP/2003 Server/Vista

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