21 tools
Validators
Syntax, formats, contrast, and local checks.
- Regex testerTest a JavaScript regular expression against text.
- JWT decoderRead the header and payload of a JSON Web Token.
- Email validatorCheck an email's shape without contacting the mailbox.
- URL validatorCheck that the text is an absolute URL.
- IPv4 validatorCheck four decimal octets without a leading zero.
- IPv6 validatorCheck the general form of an IPv6 address.
- UUID validatorCheck the format and report the version.
- Regex libraryLook up starter patterns for common tasks.
- HTML validatorCheck that opened tags are also closed.
- CSS validatorCheck that braces are balanced.
- JavaScript syntaxParse syntax without running the code.
- SQL syntaxCheck that the SQL formatter can read the statement.
- SemVer validatorCheck a semantic version.
- OpenAPI validatorCheck required fields of an OpenAPI or Swagger document.
- XML and XSDCheck that XML is well-formed and that the root appears in the pasted XSD.
- YAML schemaValidate YAML against a JSON Schema.
- MIME typesLook up MIME types for common extensions.
- Phone formatterGroup digits. Ten or eleven digits use the Brazilian shape.
- Card validatorCheck digit count, the brand prefix, and the Luhn checksum.
- IBAN validatorCheck the shape and the mod-97 checksum.
- Color contrastCalculate the WCAG ratio between two colors.