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Tool

go-fAST

Go library for parsing, traversing, transforming and regenerating JavaScript abstract syntax trees, which its README presents for code analysis, obfuscation and deobfuscation. Its parser builds on goja's parsing code, a generated SWC-style visitor API supports depth-first rewriting and cloning of nodes, a resolver tracks scopes and bindings, the ext package adds node-removal, side-effect and value-inference helpers, and a generator prints JavaScript from the tree. The documentation calls it a lightweight, faster alternative to Babel that deliberately omits parent, sibling and reference maps and automated mutation helpers.

Targets
Website
Category
Website analysis tools
Relationship
Foundation tool
Sources reviewed

Requirements & limits

  • Latest tag at review: v0.1.0, created 2026-07-02 and served by the Go module proxy under the lowercase module path github.com/t14raptor/go-fast; there are no GitHub releases. The reviewed master commit of 2026-10-04 is 11 commits ahead of that tag, with parser, resolver and generator fixes and a new PreserveParens parse option.
  • go.mod requires Go 1.24 and depends only on nukilabs/ftoa and nukilabs/unicodeid. Unit tests cover the parser, generator, resolver and statement helpers, but the only CI workflow checks that the generated union, visitor and clone files are up to date and does not run them. Guides and example visitors, such as unrolling sequence expressions and expanding variable declarations, are on the project's GitBook documentation site.
  • It is a library rather than a ready-made deobfuscator: users write their own visitors for the transformations they need and supply the JavaScript they analyze. The README does not state which ECMAScript versions it parses.
  • MIT (copyright 2024 T14Raptor); the README credits goja for parsing code and SWC for the visitor API design. No scripts were parsed or transformed in this review, and the sources establish no REA connection.

About this entry

The description was reviewed against primary sources. This does not establish runtime testing, security auditing or verified compatibility.

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Primary sources

  1. README.md GitHub · T14Raptor/go-fAST · Revision 3796954
  2. go.mod GitHub · T14Raptor/go-fAST · Revision 3796954
  3. .github/workflows/verify-generated.yml GitHub · T14Raptor/go-fAST · Revision 3796954
  4. ast/ext GitHub · T14Raptor/go-fAST · Revision 3796954
  5. parser/parser.go GitHub · T14Raptor/go-fAST · Revision 3796954
  6. LICENSE GitHub · T14Raptor/go-fAST · Revision 3796954
  7. https://github.com/T14Raptor/go-fAST/releases/tag/v0.1.0
  8. https://proxy.golang.org/github.com/t14raptor/go-fast/@v/v0.1.0.info
  9. https://gofast.disasm.dev/

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