<expression> ::= <term> (("+" | "-") <term>)* <term> ::= <factor> (("*" | "/") <factor>)* <factor> ::= <number> | "(" <expression> ")" | "-" <factor> <number> ::= <digit>+ <digit> ::= "0" | "1" | "2" | "3" | "4" | "5" | "6" | "7" | "8" | "9"

EBNF Railroad Diagram Generator

This tool generates railroad (syntax) diagrams from Extended Backus-Naur Form (EBNF) specifications.

Enter your EBNF grammar in the text area on the left and see the railroad diagram update in real-time below.

Supported syntax:

• <rule> - Non-terminal
• "text" or 'text' - Terminal
• ::= - Definition
• | - Alternative
• ( ) - Grouping
• ? - Optional (0 or 1)
• * - Zero or more
• + - One or more