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v1.0.5
85 Ready-to-use patterns

The modern regex sandbox

An interactive playground to debug expressions, synthesize regex from examples, analyze ReDoS vulnerabilities, and generate production-ready code. 100% client-side.

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Safe
Test String
3 matches
[…]+Character class […]Matches any single character listed in this set — repeated one or more times (greedy) · + — one or more times (greedy)
a-za-za-z — range from 'a' to 'z'
A-ZA-ZA-Z — range from 'A' to 'Z'
0-90-90-9 — range from '0' to '9'
..'.' — literal character
__'_' — literal character
%%'%' — literal character
++'+' — literal character
\-\-\- — escaped character
@@'@' — literal character
[…]+Character class […]Matches any single character listed in this set — repeated one or more times (greedy) · + — one or more times (greedy)
a-za-za-z — range from 'a' to 'z'
A-ZA-ZA-Z — range from 'A' to 'Z'
0-90-90-9 — range from '0' to '9'
..'.' — literal character
\-\-\- — escaped character
\.\.\. — escaped character '.'
[…]{2,}Character class […]Matches any single character listed in this set — repeated at least 2 times · {2,} — at least 2 times
a-za-za-z — range from 'a' to 'z'
A-ZA-ZA-Z — range from 'A' to 'Z'
Pattern: 48 charsInput: 128 chars
100% client-side · private
Live Highlighting

Matches highlighted in real-time with zero latency as you type.

Regex Creator

Synthesize complete patterns from positive and negative examples.

ReDoS Scanner

Analyze patterns for catastrophic backtracking vulnerabilities.

Auto-Gen Test Cases

Fuzz your regex with 10 generated valid and invalid strings.

Code Generator

Instant code snippets for TS, Zod, Go, PHP, Vitest, and Pest.

100% Private

All client-side. Patterns and test inputs never leave your browser.

Take patterns to production natively

One single source of truth. Distributed to JS/TS, Python, Go, PHP, and Rust.

View docs
validate.ts
Install Command
$ npm i @regexto/validators
Basic Usage
import { validate, test } from '@regexto/validators';

// Full validation
const result = validate('email', 'hello@regex.to');
console.log(result.valid); // true

// Fast boolean check
const isMatch = test('url', 'https://regex.to'); // true