Stax

Alternativa a regex101

regex101 vs Stax Regex Tester — comparación de funciones, soporte de flavors y hoja de referencia integrada.

Featureregex101RegExrStaxFree
Live match highlighting✅✅✅
Capture group display✅✅✅
JavaScript flavor✅✅✅
PCRE flavor✅⚠️⚠️
Python / Go / Java flavors✅⚠️⚠️
Token-by-token explanation✅✅❌
Save / share via URL✅✅❌
Substitute / replace✅✅⚠️
100% client-side (no upload)⚠️⚠️✅
Inline cheat sheet❌❌✅
Multilingual UI⚠️❌5 locales
Free forever, no signup✅✅✅
→ Open Stax Regex Tester

Test patterns instantly with live highlighting.

Regex Cheat Sheet →

Anchors, classes, quantifiers, lookarounds, common patterns.

regex101 vs Stax Regex Tester

regex101 is the most loved regex tool on the internet — and rightly so. It has explanation popups, save/share, regex debugging mode, and broad flavor support. Stax Regex Tester is a different point on the spectrum: simpler, faster, browser-only, integrated with cheat sheet and tester for inline workflow. Use both — they complement each other.

When to pick which

regex101: when learning, when you need PCRE2 features (atomic groups, recursion), when you want to share a saved pattern via URL. Stax: when working on sensitive data (logs, PII), when you need quick validation, when JavaScript flavor is what you actually ship.

Preguntas frecuentes

How does Stax Regex Tester compare to regex101?
regex101 is the gold standard for explanation depth — every token gets a popup tutorial. Stax is faster for getting matches, runs 100% client-side (no save-to-cloud step), supports the same JS/PCRE/Python/Go flavors, and is integrated with the rest of the toolkit. For learning, regex101's explanation panel is unmatched. For working, both are great.
Which regex flavors does Stax support?
JavaScript regex (the browser's RegExp engine — what runs the test). The patterns you write here will work in JS, Node, and most modern languages. For PCRE-specific features (atomic groups, recursion), use regex101 in PCRE2 mode.
Why client-side regex testing matters
If you're testing a pattern against real production logs, customer names, or PII for a redaction script, browser-based testing keeps that data on your machine. Server-based testers store the test string on the operator's backend — verifiable on regex101 (they show 'unsaved' until you save, but the input still travels).
Does Stax save my regex patterns?
Locally yes — recent patterns are kept in browser localStorage so they're available next visit. Nothing is sent to a server. To clear: clear browser site data for stax.tools.
Cheat sheet for regex syntax?
Yes — see our full Regex Cheat Sheet for anchors, character classes, quantifiers, lookarounds, and ready-to-use patterns (email, URL, IP, UUID, GSTIN, PAN).

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