Convert file sizes, bases, physical units and timestamps, calculate dates, factorials and IPv4 subnets, and convert data between JSON, YAML and XML.
Convert Unix seconds or milliseconds to dates and back, with ISO output and a chosen time zone. The Unix epoch starts at 1970-01-01 00:00:00 UTC; a time zone changes the display, not the timestamp of the same instant.
Good for converting interface examples and configuration data: preserving large integers, exact decimals, and string types without reserializing numbers through JavaScript floats.
Convert file sizes between bytes, KB, MB, GB and binary units such as KiB, MiB and GiB. Supports decimal and scientific notation, with separate 1000-based and 1024-based unit tables.
Calculate an IPv4 network address, subnet mask, broadcast address, usable IP range and host count from CIDR notation. Supports /0–/32 and preset masks; this is a calculator, not a network scanner.
Format decimal numbers with thousands separators, scientific notation, percentages, currency display and Chinese number words. Large integers and decimals retain precision; currency formatting does not convert exchange rates.
Accurately convert binary, octal, decimal, hexadecimal and base 2–36 integers. Supports positive and negative numbers and large integers, strictly checks each digit, and provides quick selection of commonly used bases.
Convert meters, inches, kilograms, pounds, US volume and temperatures in Celsius, Fahrenheit and Kelvin. Select the original unit and target unit by category, and provide common combination and exchange unit functions.
Convert between XML and JSON objects, using @_ for attributes, #text for text, and preserving numeric strings such as 00123. Explicitly note conversion loss for annotations, CDATA, and mixed content.
Exactly compute integer factorials from 0 to 5000 without losing large integer digits.
Calculate the number of days between two calendar dates, or add or subtract days to a date.
View the sign bit representation, one's complement, and two's complement representation of an integer with a specified word length.