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🚂 Regex Visualizer

Convert regex patterns into railroad diagrams with bilingual structural explanation, common presets, and SVG/PNG export

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Free online regex visualizer that converts regular expressions into railroad diagrams for clear structural understanding. Supports capturing groups, quantifiers, character classes, lookahead/lookbehind assertions, and all common syntax. Built-in preset patterns, bilingual line-by-line explanation, SVG and PNG export. Runs entirely in the browser — your input data is not uploaded by the tool.