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Settings
Paste JavaScript or TypeScript code, choose the transform level and the target environment. Press Obfuscate to generate harder-to-read JavaScript, then copy or download the result. The code is processed locally in your browser.

Obfuscation does not encrypt code or protect secrets. Check the result before publishing: more intense profiles can significantly increase the size and reduce performance.

Moderate protection for general use
Generate code that supports policies that block eval
Source code
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How it works

Transforms JavaScript or TypeScript code into a functionally equivalent version that is much harder to read and reverse-engineer. It renames identifiers, restructures the flow, and hides text strings.

It offers intensity profiles (for example, lighter or more aggressive) and target destinations depending on where the code will run, to balance protection and performance.

Processing runs entirely in your browser, without sending the code to any server. Obfuscation makes reading harder, but it is not encryption: a determined attacker can still analyze the result.

Examples

function greet(name) { return "Hola " + name; }var _0x1a2b=['Hola\x20'];function _0x3c(_0x4d){return _0x1a2b[0x0]+_0x4d;}Names are replaced with cryptic identifiers and strings are hidden in an array.

Use cases

  • Make it harder to copy or analyze scripts served on the client.
  • Hide sensitive strings or logic in embedded widgets.
  • Raise the barrier against casual reverse engineering.
  • Protect intellectual property in demos or distributed trials.

Frequently asked questions

Is obfuscation the same as encrypting the code?

No. Obfuscation makes the code hard to read, but it still runs as-is in the browser. It is not encryption: anyone with time and tools can analyze it. Never hide real secrets, such as API keys, in client-side code.

Does it affect the performance of the obfuscated code?

It can. The more aggressive profiles add layers of protection that increase the size and may slow down execution. Choose the profile according to the balance you need between protection and speed.

Can I reverse the obfuscation?

There is no function to undo it, and the original names and comments are lost. Always keep a copy of the un-obfuscated source code before generating the protected version.

Is my code uploaded to a server?

No. Obfuscation runs entirely in your browser; the code never leaves your computer.

See also