Health
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-validatorData Visualization
Create vertical thermometer-style charts perfect for fundraising goals, project progress, and target achievement visualization
thermometer-chartData Visualization
Generate interactive tree diagrams from hierarchical data with customizable styling
tree-diagram-generatorDevelopment
Build and construct URLs with parameters by adding query strings, hash fragments, and path segments
url-parameter-builderDevelopment
Extract and parse parameters from URLs including query strings, hash fragments, and path segments
url-parameter-extractor