Binary · Decimal · Hex · Angles
Math · Bases
Binary to hexadecimal, radians to degrees — base and angle conversion for math and CS.
BIN ↔ DEC ↔ HEXrad ↔ degfraction ↔ decimalRoman numerals
Base conversion
BIN/OCT/DEC/HEX multi-grid · binary 4-digit spacing · hex A-F only
Unix Timestamp Converter
Convert 10-digit (seconds) or 13-digit (milliseconds) Unix timestamps to UTC and your local browser time — or reverse-convert datetime to epoch.