text in → diagrams out
Code becomes clarity.
Instantly.
Paste in an ANTLR, BNF, ABNF, or EBNF grammar and get back production-ready SVG railroad diagrams — no tooling, no setup, no login required.
Syntax diagram example
ANTLR → railroad diagram
Input
expr
: term
| expr '+' term
| expr '-' term
;
: term
| expr '+' term
| expr '-' term
;
→
Ready to diagram your own grammar? Paste it in and see it come to life.
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SVG
clean output
free
to start
ANTLR
BNF · ABNF · EBNF
0
dependencies
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