ValidatorsValidatorsValidators

Validate JSON, check regular expressions, verify emails, and more.

JSON Validator

Real-time JSON syntax validator with structural statistics, error line detection, and automatic syntax repair.

Regex Tester

Test regular expressions in real time with live match highlighting, capture group analysis, and instant presets.

Email Validator

RFC 5322 syntax validation, disposable mailbox detection, role account identification, and bulk email list cleaner.

Credit Card Validator

100% client-side Luhn algorithm checksum verification, card issuer BIN identification, and step-by-step arithmetic visualizer.

URL Validator

Validate RFC 3986 URL syntax, inspect scheme/hostname/pathname/query parameters, and audit bulk links.

XML Validator

Validate XML documents against W3C well-formedness standards, pinpoint syntax error lines, inspect structural statistics, and beautify code.

Password Strength Checker

Evaluate cryptographic entropy bits, character pool composition, dictionary flaws, and estimated GPU cluster cracking time.

IP Address Validator

Validate IPv4 & IPv6 addresses with optional CIDR masks, classify private RFC 1918 / loopback ranges, and convert integer/hex/binary notations.