Focused Browser Regex & Glob Tester
When working in JavaScript or TypeScript, testing directly against the native ECMAScript RegExp engine guarantees identical runtime behavior. Our Regex & Glob Tester highlights matches live, lists numbered and named capture groups, previews string replacements, and tests file-path globs.
Try the free Regex & Glob Tester now
No account required · Runs in your browser · Instant results
Regex101 vs thefreeaitools.com — feature comparison
| Feature | Regex101 | thefreeaitools.com |
|---|---|---|
| Engine | PCRE / Python / JS / Go | Native ECMAScript RegExp + Glob matcher |
| Catastrophic backtracking check | Debugger | Nested quantifier warning |
| Shareable URL state | Server-saved permalinks | Stateless URL query parameters |
Why choose thefreeaitools.com over Regex101?
Exact JS runtime parity
Runs directly on your browser's JavaScript RegExp engine with full Unicode flag support.
Built-in glob path matcher
Test **, *, and ? file globs alongside regular expressions.
For PCRE or Go-specific syntax, use a multi-engine debugger; for JavaScript/TypeScript regexes and globs, this local workspace stays fast and stateless.
Frequently asked questions
Are my test strings saved on a server when sharing a link?
No. Share links encode the pattern and flags directly in URL query parameters.
Test ECMAScript regular expressions with live capture groups and substitutions, inspect deterministic token-by-token regex explanations, and match .gitignore/bundler glob patterns.
- Permanently free — no plans or tiers
- No account or sign-up required
- Runs entirely in your browser
- Files never leave your device