Security
Encrypt or decrypt text and files with AES-256-GCM and export IV-based bundles
aes-encryption-toolSecurity
Inject visible or signature-style watermark fields into CSV or JSON exports so shared datasets can be traced later
csv-json-data-watermarkerSecurity
Decode JWT header and payload, verify HS256 or RS256 signatures, and flag algorithm, expiry, and sensitive-claim security risks
jwt-decoder-security-auditorValidation
Detect common WCAG 2.1 accessibility issues in HTML, fetched pages, or design images and return fix-ready guidance
accessibility-checkerValidation
Validate ISO 4217 currency codes
currency-validatorValidation
Validate phone numbers from multiple countries including China, US, and more with detailed formatting and carrier info
global-phone-validatorValidation
Validate Amazon Resource Names (ARNs) format for AWS cloud resources
aws-arn-validatorValidation
Validate postal codes from multiple countries including US ZIP, UK Postcode, Canada, and more
global-postal-code-validatorValidation
Validate license plate formats from multiple countries including China, USA, Japan, and more
license-plate-validatorValidation
Validate Hex (#FFF, #RRGGBB), RGB/RGBA, HSL/HSLA color code syntax
color-code-validatorValidation
Validate Linux Crontab定时任务表达式（分 时 日 月 周）syntax
cron-expression-validatorValidation
Validate credit card numbers and identify card type (Visa, MasterCard, UnionPay, etc.)
credit-card-validator