EBNF Railroad Visualizer
Parse a bounded EBNF subset, draw real SVG branches, and audit references/cycles.
Enabling local controls…
EBNF subset: = ; , | ( ) [ ] { }, quoted terminals and nonnested (* comments *);100 rules/2000 tokens/20 levels. Repeat means zero or more; recursive references are not inherently invalid.
Each field32KiB, complete output1MiB;Worker startup10s/processing1s. Local processing; no execution or input-URL fetch.
Results and preview
Edit or select files, then process. Input changes clear old output.
Source interface reviewed2026-10-19: ToolHub
How to use this tool
Edit the inputs, process locally, then inspect the complete output before copying or downloading. Changes cancel pending work.
When not to use it
No commands, scripts, decoded links or input URLs are executed or opened. Each field32KiB, output1MiB. Worker startup10s, processing1s. Generated configurations require review and testing in the target environment.