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hajas

hajas is a JavaScript deobfuscator written in haskell.

Building

Use stack:

stack build

There's also a nix derivation available, so it should build with:

nix build

Or enter a shell with hajas ready for use:

nix run

Usage

If using stack, print usage with

stack exec hajas -- -h

Usage: hajas ([-a] | [-l]) [-f FILE] [-r FILE] [-e PASS]
  JavaScript deobfuscator

Available options:
  -a                       Print AST
  -l                       List passes
  -f FILE                  Input file. stdin if not given
  -r FILE                  Replacements file
  -e PASS                  Exclude pass
  -h,--help                Show this help text

Known issues

• language-ecmascript library fails to parse some valid language features like octal numbers.
• Pretty printing is not very pretty.