Validation
Validate Docker image names and tags according to Docker naming conventions
docker-image-tag-validatorValidation
Validate European Union Value Added Tax (VAT) numbers from all EU member states
eu-vat-validatorData Visualization
Generate customizable Venn diagrams to visualize set relationships, intersections, exclusions, and hierarchical structures
euler-diagram-generatorData Visualization
Generate customizable donut charts (ring charts) from data with various styling options, perfect for showing proportions with a central space
donut-chart-generatorText Processing
Extract even-numbered lines from text content with support for various indexing methods and custom criteria
even-line-extractorMath & Numbers
Convert between different density units (kg/m³, g/cm³, lb/ft³, etc.)
density-converterMath & Numbers
Calculate electricity costs based on power consumption and usage time
electricity-calculatorValidation
Validate email addresses and check deliverability
email-validatorMath & Numbers
Convert between different energy units (joules, calories, kilowatt-hours, BTU, etc.)
energy-converterFinance
Check if a string is an Ethereum address. Does not validate address checksums.
eth-address-validatorValidation
Validate .env files for syntax errors and common issues
env-file-validatorFormat Conversion
Convert Excel file to CSV format, extracting data from the first worksheet
excel-to-csv