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Formateadores y código

Probador de Regex

Probador de regex gratuito con resaltado en vivo. Escribe regex de JavaScript, ve cómo las coincidencias y los grupos de captura se actualizan mientras escribes. El mismo motor que usa tu navegador.

Runs in your browser
Pattern
//gi
Flags
Common patterns
Test string2 matches
Highlighted
Email ada@example.com or grace.hopper@navy.mil for info.
Matcheswith capture groups
  • #1 · index 6ada@example.com
    • $1ada
    • $2example.com
  • #2 · index 25grace.hopper@navy.mil
    • $1grace.hopper
    • $2navy.mil
Replace

Toggle on to write a replacement string and see the result. Use $1, $2, … to reference capture groups.

Cheatsheet
  • \dany digit (0-9)
  • \wword character (letters, digits, _)
  • \sany whitespace
  • .any single character
  • *zero or more of the preceding
  • +one or more
  • ?optional (0 or 1)
  • {n,m}between n and m of the preceding
  • ^start of string (or line with m)
  • $end of string (or line with m)
  • [abc]any of a, b, or c
  • [^a-z]anything BUT lowercase a-z
  • (…)capture group
  • (?:…)non-capturing group
  • |alternation (or)

Nota del editor

Understanding · Patterns, not literals.

Este capítulo en profundidad está disponible solo en inglés por el momento. La herramienta de conversión de arriba funciona en tu idioma; el artículo explicativo extenso aún no se ha traducido.

Preguntas frecuentes

Quick answers.

Which regex flavor is used?

JavaScript regex (ECMAScript), evaluated by the same engine your browser uses. Matches PCRE for most common patterns but differs on lookbehinds and named groups.

What flags can I use?

g (global), i (case-insensitive), m (multiline), s (dotAll), u (unicode), y (sticky).

Are matches highlighted live?

Yes — every keystroke re-runs the regex and updates highlights immediately.

Are capture groups shown?

Yes. Numbered and named capture groups are listed for each match.

Is my input sent anywhere?

No — everything runs in your browser. Useful when testing regex against sensitive text.

Is the regex tester free?

Yes — fully free, no signup.

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