Parse a regular expression into a railroad (syntax) diagram with live preview and SVG export.
FAQ
When is a railroad diagram useful for regex?
When reading a complex pattern, the diagram turns nested structure into visible branches and paths, far easier than decoding metacharacters one by one. It suits code review, teaching and debugging.
How can I export the generated diagram?
Download it as an SVG file with one click, or copy the SVG code and paste it into a web page or document. The diagram updates in real time while you type.
All data is processed locally in your browser. Nothing is uploaded.