Calculation & Conversion
Timestamps, IP and subnet math, units and everyday numbers.
Encoding & Decoding · Developer Formatting · Text · Generators · Images
Tools
Unix Timestamp Converter
Convert Unix seconds or milliseconds to dates and back, in your timezone or UTC.
PopularIP Range to CIDR Converter
Turn an IP range into the smallest CIDR set, or a CIDR block back into its range. IPv4 and IPv6.
PopularSubnet Mask Calculator
Netmask, wildcard, host capacity and subnet splits for any IPv4 address.