JWT Token

Matches a JSON Web Token (JWT) — three Base64URL-encoded segments separated by dots.

✓ JWT format validation✓ Auth middleware✓ API token parsing

Test String

1 match

eyJhbGciOiJIUzI1NiIsInR5cCI6IkpXVCJ9.eyJzdWIiOiIxMjM0NTY3ODkwIn0.dozjgNryP4J3jVmNHl0w5N_XgL0n3I9PlFUP0THsR8U

[…]+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

\.\.— \. — escaped 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

--— '-' — literal character

\.\.— \. — escaped 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

--— '-' — literal character

Pattern: 46 charsInput: 108 chars

100% client-side · private

✓ Valid Examples

eyJhbGciOiJIUzI1NiIsInR5cCI6IkpXVCJ9.eyJzdWIiOiIxMjM0NTY3ODkwIn0.dozjgNryP4J3jVmNHl0w5N_XgL0n3I9PlFUP0THsR8U