Health
Calculate baseball batting statistics including batting average and on-base percentage
baseball-statsHealth
Calculate bowling score with frame-by-frame breakdown
bowling-scoreText Processing
Extract all email addresses from input text, articles, web source code, or mixed content. Supports deduplication and export to JSON.
bulk-email-extractorText Processing
Extract all HTTP/HTTPS links from text with deduplication and export options
bulk-url-extractorValidation
Validate Amazon Resource Names (ARNs) format for AWS cloud resources
aws-arn-validatorFinance
Calculate bond current yield and yield to maturity (YTM)
bond-yield-calculatorDeveloper Tools
Generate test credit card numbers for development and testing purposes
credit-card-generatorValidation
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-validatorMedia
Compute dynamic range via crest factor (peak minus RMS)
audio-dynamic-range-meterMedia
Render a polar stereo image to visualize width and panning
audio-goniometerMedia
Measure integrated, short-term, and momentary LUFS
audio-lufs-meter