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Regex Generator from Text

Paste a few examples and the tool generates a regex matching them, with capture groups, quantifiers, and alt-operators inferred automatically.

Sample text (one per line)

color: red
color: blue
color: green
color: rgb(255, 0, 0)

Inference is heuristic: when examples share a prefix/suffix, an alternation group is built.

How to use Regex Generator from Text

1Paste your input in the panel above or use the example data if available.
2Choose an action — format, generate, convert, encode, or analyze.
3Your result appears instantly. Use Copy to grab it, or Download if a file option is shown.

Runs entirely in your browser

Nothing you type, paste, generate, or upload leaves your device.

Test regular expressions.

Reference for all regex syntax.