JavaScript Obfuscator
Heavy obfuscation for throwaway demos; not a substitute for server-side secrets.
When to use this tool
- Obfuscating a throwaway demo for a live presentation.
- Hiding a trivial client-side secret that you know is not truly secret.
- Teaching why obfuscation is not a substitute for server-side security.
How it works
- Paste the JavaScript.
- Click obfuscate.
- Copy the output — expect it to be significantly larger.
- Never use obfuscation to hide API keys or other real secrets.
Privacy: This tool runs entirely in your browser. Your input is not sent to our servers.
Obfuscation inflates bundle size and hurts debugging. Do not rely on it for secrets—use server-side protection instead.
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Frequently asked questions
Can obfuscated code be reversed?
Yes, given time and tools. Obfuscation raises the cost of inspection; it does not make the code secret.
Why is the output slower?
Obfuscation introduces indirection layers that browsers spend extra cycles resolving.
Does it obfuscate async or class syntax?
Yes. Modern syntax is supported. Very old ES5-only environments may need you to transpile first.