Development
Batch parse URL query parameters with output of key frequency, value samples, and encoding anomaly detection
url-query-analyzerText Processing
Add thousand separators to long numbers (supports comma, dot, space, and custom separators)
thousands-separatorUtilities
Calculate UTM zone from latitude and longitude coordinates
utm-zone-calculatorDevelopment
Validate variable names against multiple programming language naming conventions and standards
variable-name-validatorHealth
Calculate total time and pace for triathlon events
triathlon-calculatorFitness
Calculate Training Stress Score (TSS) for workout intensity and duration
training-stress-scoreValidation
Identify and validate tracking numbers from FedEx, UPS, DHL, USPS, SF Express (顺丰) and other major carriers
tracking-number-validatorValidation
Validate GTIN-12 (UPC), GTIN-13 (EAN), GTIN-8, and GTIN-14 product barcodes with check digit verification
upc-ean-validatorValidation
Validate United States driver's license numbers based on state-specific format rules (CA, NY, TX, FL, etc.)
us-drivers-license-validatorValidation
Validate United States Employer Identification Number (EIN) format used for business tax identification
us-ein-validatorValidation
Validate United States Social Security Number (SSN) format with area number verification
us-ssn-validatorValidation
Validate United States ZIP codes including standard 5-digit and ZIP+4 formats
us-zip-code-validator