Herramienta browser-only
Probador de expresiones regulares
Evalua patron, flags y resultados match localmente sin subir texto.
Advertencia: patrones regex complejos pueden ser lentos o inseguros con entradas grandes. El comportamiento de JavaScript puede diferir de otros lenguajes.
Privacidad y limitaciones
Patterns and sample text are processed locally in your browser and are not uploaded.
- This page uses JavaScript RegExp behavior; other languages can differ.
- Complex patterns can hang or perform badly on large input.
- Do not run untrusted regex patterns against large sensitive datasets without safeguards.
Paginas relacionadas
FAQ
Which regex flavor is used?
The browser JavaScript RegExp engine is used, so behavior can differ from PCRE, Python, Java, or .NET.
What is ReDoS?
ReDoS is a denial-of-service risk caused by regex patterns with catastrophic backtracking on certain inputs.
Can this replace production tests?
No. It is useful for exploration, but production patterns should be tested in the same runtime as the app.
Are sample texts uploaded?
No. Matching runs locally in the browser.
Why do flags matter?
Flags such as g, i, m, s, u, and y change matching behavior and output.