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AST Visualizer - Free Online JavaScript AST Tool | IconVault

Paste JavaScript and explore its abstract syntax tree as an interactive tree or raw JSON. Powered by Acorn. Free, runs in your browser.

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AST Visualizer

See JavaScript as an interactive syntax tree

5 of 5 free uses left

5 of 5 free copies left.

Parse something to see its tree

JavaScript is parsed with the real acorn parser (loaded on demand).

About this tool

IconVault's AST Visualizer parses your JavaScript with Acorn and renders the abstract syntax tree as an expandable interactive tree, alongside the raw JSON output. Click nodes to inspect their type, range, and properties.

It is built for anyone learning how parsers, linters, and transpilers see code: students, Babel plugin authors, and ESLint rule writers. Free and runs fully in your browser.

Frequently asked questions

Popular searches

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