Developer calculators

Developer calculators for timestamps, number systems, and network math.

Use practical developer calculators for Unix time, base conversion, subnetting, and related technical work.

All calculators

Convert colors between HEX, RGB, and HSL formats instantly.

Validate and pretty-print JSON with structure analysis.

Generate random UUID v4 identifiers instantly.

Estimate subnet mask, network address, broadcast address, and usable hosts.

Convert Unix timestamps to UTC dates or turn a date into epoch seconds.

Convert a whole number into binary, octal, decimal, and hexadecimal.