JavaScript Deobfuscator | Decode Obfuscated JS Code Online

JavaScript deobfuscator decodes hex escapes, String.fromCharCode, base64 payloads and string-array lookups, then re-indents the code. Every change is syntax checked in the browser. Designed specifically for developers and professionals, this free online formatter runs entirely in your browser to process tasks quickly and securely. Enjoy unlimited usage with no data tracking and no registration required.

Also known as: javascript deobfuscator · deobfuscate javascript online · decode obfuscated javascript · javascript unpacker online · unminify javascript code · javascript deobfuscator free

javascript and typescript tools

text tools

color tools

formatters

Obfuscated JavaScript

Re-indent the result

Splits statements onto their own lines. Turn it off to keep the original spacing.

Readable Output

About JavaScript Deobfuscator

Decode obfuscated or minified JavaScript back into something readable: hex string escapes, String.fromCharCode calls, base64 payloads, hex numbers and string-array lookup tables.

Key Features

Inlines the classic string-array pattern, resolving both _0x1a2b[7] and wrapper-function lookups back to real strings
Decodes \xNN and \uNNNN escapes inside string literals, evaluates literal String.fromCharCode and atob calls
Rewrites hex numeric literals as decimal and collapses obj["prop"] into obj.prop
Every transform is parse-checked with acorn and reverted if it would break the syntax tree, so the output still runs

Use Cases

Work out what a suspicious script found on a page or in a browser extension actually does before running it
Read a third-party widget or vendor bundle when no source map was shipped
Recover the intent of your own minified build output while debugging a production-only error

Related Keywords

javascript deobfuscator

deobfuscate javascript online

js unminify tool

decode obfuscated javascript

string array deobfuscator

hex escape decoder javascript

Privacy & Security

All processing happens locally in your browser. Your data never leaves your computer, ensuring complete privacy and security.

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Frequently asked questions

What is JavaScript Deobfuscator used for?

JavaScript deobfuscator decodes hex escapes, String.fromCharCode, base64 payloads and string-array lookups, then re-indents the code. Every change is syntax checked in the browser.

Is JavaScript Deobfuscator free to use?

Yes. JavaScript Deobfuscator is completely free with no usage limits, and there is no paid tier required to use it.

Do I need an account to use JavaScript Deobfuscator?

No. JavaScript Deobfuscator works immediately in your browser with no signup, login, or email address required.

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