This is a free online utility designed for developers and data analysts. It allows you to instantly convert Unix timestamps (seconds or milliseconds) into human-readable dates and vice versa. The tool supports global timezone calculations, making it easy to synchronize logs, debug databases, and handle cross-border time conversions without manual calculation.

A Unix timestamp tracks time as a running total of seconds that have elapsed since the Unix Epoch: January 1, 1970, at 00:00:00 UTC. It helps computers track time linearly regardless of location, ignoring leap seconds. It is widely used in operating systems, file formats, and internet protocols.

Standard Unix timestamps are 10 digits long (seconds). However, many modern programming languages like JavaScript and Java use 13-digit timestamps (milliseconds) for higher precision. This tool automatically detects the input length or allows you to manually select the unit to ensure accurate date conversion.

This usually happens due to timezone differences. Timestamps are based on UTC (Coordinated Universal Time). If you are in New York (EST) or London (GMT), the displayed time needs to be adjusted. Use the 'Target Timezone' feature in this tool to convert the result strictly to your desired local time.