JS Deobfuscator-JavaScript obfuscation removal tool

Example

When a user provides a JavaScript file that contains both clear and obfuscated code, JS Deobfuscator scans the entire file and identifies all the functions. For instance, in a file with 20 functions, 5 of which use obfuscated variable names like '_0x1234', this function will isolate those functions for deeper analysis.

Scenario

A security analyst investigating a suspicious browser extension written in JavaScript wants to quickly isolate the parts of the code that appear obfuscated, rather than manually searching through hundreds of lines.

Example

Within an identified function, JS Deobfuscator analyzes all variables. If a variable like 'a' or '_0x5678' is found, it checks how it’s being used in the function and determines if it should be renamed to something more descriptive.

Scenario

A developer debugging a large JavaScript application suspects some of the variables have been obfuscated during minification and needs to recover the original variable names to understand the logic better.

Example

After reviewing a variable that looks obfuscated (e.g., '_0x7890'), the tool might suggest renaming it to 'userID' based on its usage in the function. This renaming is not automatic—users are prompted to either confirm or reject the new name.

Scenario

A reverse engineer working on a compromised web application identifies several obfuscated variables that make tracing the application's logic difficult. Using JS Deobfuscator, they gradually replace these obfuscated names with meaningful ones, making it easier to identify the application's malicious behavior.