Domain Name

Matches a valid domain name including subdomains and international TLDs.

✓ DNS validation✓ Link parsing✓ Domain registration checks

Safe

Test String

4 matches

example.com
sub.domain.co.uk
my-site.io
regex.to

(?:…)+Non-capturing group— Non-capturing group — groups without capturing (no index assigned) — repeated one or more times (greedy) · + — one or more times (greedy)

[…]Character class […]— Matches any single character listed in this set

(?:…)?Non-capturing group— Non-capturing group — groups without capturing (no index assigned) — repeated zero or one time (optional) · ? — zero or one time (optional)

\.\.— \. — 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: 65 charsInput: 48 chars

100% client-side · private

✓ Valid Examples

example.com
sub.domain.co.uk
my-site.io
regex.to

✗ Invalid Examples

-invalid.com
invalid-.com
.com
localhost

Usage & Integration

Validate Domain Name natively in your backend or frontend without copying regex strings.

Node / Edge

import { validate } from '@regexto/validators';

validate('domain', '...');

Python

from regexto_validators import validate

validate("domain", "...")

Go

import "github.com/regex-to/validators-go"

valid, err := validators.Validate("domain", "...")

PHP

use RegexTo\Validators\Validator;

Validator::validate('domain', '...');

Rust

use regexto_validators::validate;

let is_valid = validate("domain", "...").unwrap();