Deobfuscate JavaScript with controls for formatting, simplification, and evaluation in this browser tool.
jsdfe
Make obfuscated JavaScript easier to read with jsdfe, a tool for examining its approximate behavior.
About jsdfe
jsdfe makes obfuscated JavaScript easier to read to help understand its approximate behavior. It accepts pasted text or a dropped file as input, and provides output that can be downloaded, copied to the clipboard, or cleared.
It is built on Node.js and Babel and includes processing options that affect accuracy. It does not aim to reproduce the original code or output executable code, often terminates with an uncaught error, can freeze in an infinite loop, and executes some target script code in a VM without security consideration.
Key features
- Paste text or drop file as input
- Transform obfuscated scripts for readability
- Download transformed output
- Copy output to clipboard
- Clear output
- Run code in iframe VM
Best for: People reviewing obfuscated JavaScript who want more readable code to assess approximate behavior.
Good for
- Accepts pasted text or dropped files as input
- Output can be downloaded or copied to clipboard
- Progress is shown in the developer tools console
Watch out for
- Often terminates with an uncaught error
- Sometimes enters an infinite loop and freezes
- Executes some target script code in VM without security consideration
jsdfe at a glance
- Category
- Development › Programming Languages
- Type
- Online tool
- Pricing
- Not confirmed. Check the site
- Platforms
- Web
- Open source
- Not stated
- Good for
- Developers
- Last checked
- Oct 5, 2026 · Online when checked
- Listed
- Oct 5, 2026
jsdfe alternatives
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Copy and paste reusable JavaScript utility functions from the Underdash collection.
Compress JavaScript with the Closure Compiler and choose an optimization level and formatting options.
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jsdfe FAQ
What does jsdfe not do?
It does not try to reproduce the original code or output executable code.
Where is progress shown?
Progress is output to the console of the developer tools.
How can input be provided?
By pasting text or dropping a file into the input area.
Is something wrong or out of date?
Tell us and an editor will check it.
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