The modern regex sandbox

Visualize matches, debug failures at the exact character, generate production-ready code in Go, PHP, TypeScript and Zod — all without a server.

Test String

3 matches

Valid emails:
user@example.com
john.doe+tag@sub.domain.co.uk
contact@regex.to

Invalid:
plainaddress
@missinglocal.com
user@.com

[…]+Character class […]— Matches any single character listed in this set — repeated one or more times (greedy) · + — one or more times (greedy)

a-za-z— a-z — range from 'a' to 'z'

A-ZA-Z— A-Z — range from 'A' to 'Z'

0-90-9— 0-9 — 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-z— a-z — range from 'a' to 'z'

A-ZA-Z— A-Z — range from 'A' to 'Z'

0-90-9— 0-9 — 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-z— a-z — range from 'a' to 'z'

A-ZA-Z— A-Z — range from 'A' to 'Z'

Pattern: 48 charsInput: 128 chars

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Take patterns to production with `@regex.to/validators`

TypeScript-first · Zod integration · Zero dependencies

bash

$ npm install @regex.to/validators
$ node -e "const {test}=require('@regex.to/validators'); console.log(test('email','hi@regex.to'))"
true