whatevertool logowhatevertool

Regex Railroad Diagram Visualizer

Generate interactive SVG railroad syntax diagrams from any regular expression pattern. Fast, free, and fully client-side.

//
account_tree

Railroad Flowchart Diagram

Execution tracks left to right from start (green) to finish (red)

Start of Line (^) One of: [a-zA-Z0-9._%+-] @ One of: [a-zA-Z0-9.-] . One of: [a-zA-Z] End of Line ($)
Legend:
Start
End
Literal Text
Character Class
Anchor
Group

How the Regex Railroad Diagram Visualizer Works

Converts regular expression patterns into clear, visual flowchart railroad diagrams. Understand complex regex branches, character sets, capture groups, and quantifiers at a glance.

Usage Example

Paste a complex email or URL regex to see all execution branches rendered as an SVG diagram.

Frequently Asked Questions

Can I export the generated diagram?

Yes, you can copy the SVG markup or download it as an SVG image file.

Browse more

See all developer reference guides and interactive utilities.