Hashtag

Matches a social media hashtag — # followed by one or more word characters (letters, digits, underscores), starting with a letter.

✓ Social media parsing✓ Content tagging✓ Trending topics

Safe

Test String

4 matches

#regex
#WebDev2024
#hello_world
#TypeScript

##— '#' — literal character

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

A-ZA-Z— A-Z — range from 'A' to 'Z'

a-za-z— a-z — range from 'a' to 'z'

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

Pattern: 22 charsInput: 43 chars

100% client-side · private

✓ Valid Examples

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

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

validate('hashtag', '...');

from regexto_validators import validate

validate("hashtag", "...")

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

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

use RegexTo\Validators\Validator;

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

use regexto_validators::validate;

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