Unveil Hidden Code in Seconds

Paste obfuscated snippets and get clear, readable code instantly. Built for developers, security analysts, and reverse engineers who need to decode URL-encoded obfuscation fast — no setup, no signup, 100% in your browser.

Results update live as you type — no button needed. The Example button fills a sample input.

Why use Code Deobfuscator?

Instantly decode URL-encoded obfuscation into readable code

Perfect for security analysis, debugging, and reverse engineering

Handles percent-encoding, plus signs, and mixed obfuscation patterns

Runs entirely in your browser — your code never leaves your device

Clean, copy-ready output for further analysis in any editor

FAQ

What types of obfuscation does this tool decode?

This tool specializes in URL-encoded (percent-encoded) obfuscation, which is one of the most common ways code is hidden in web payloads, scripts, and logs. It converts sequences like %20 and %3D back into readable characters.

Is my code sent to a server?

No. All decoding happens locally in your browser using JavaScript. Your code never leaves your device, making it safe for sensitive or proprietary snippets.

Can I use this for security analysis and reverse engineering?

Absolutely. Security analysts and reverse engineers use this tool to quickly reveal hidden payloads, decode suspicious scripts, and understand obfuscated code without writing custom scripts.

What if the output still looks obfuscated?

Some code uses multiple layers of obfuscation. If the output still contains encoded characters, paste it back into the tool to decode additional layers.

Example input

Try it with this sample — paste it into the box above:

var%20x%20%3D%20%22hello%20world%22%3B%20console.log%28x%29%3B

How to use Code Deobfuscator

  1. Enter or paste your data into the Obfuscated Code box above.
  2. The result appears instantly in the Deobfuscated Code box — everything runs in your browser, nothing is uploaded.
  3. Use Copy or Download to keep the result, or Example to load a sample first.

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