Unix Timestamp Converter

Free

Convert Unix timestamps to readable dates and vice versa. Supports seconds and milliseconds.

Current Time

Unix (seconds)

1784845264

Unix (milliseconds)

1784845264869

ISO 8601

2026-07-23T22:21:04.869Z

Timestamp → Date

Unix Timestamp

Seconds or milliseconds — auto-detected by magnitude

Enter a timestamp above to see conversions

Common timestamps

Date → Timestamp

Date / Date-Time

Pick a date above to see its timestamp

Quick Reference

What is Unix time?

Seconds elapsed since January 1, 1970 00:00:00 UTC (the Unix epoch). Also called epoch time or POSIX time.

Seconds vs Milliseconds

10-digit numbers are seconds (1700000000). 13-digit numbers are milliseconds (1700000000000). JavaScript uses ms by default.

Max Unix timestamp

32-bit: Jan 19, 2038 (Year 2038 problem). 64-bit: approx 292 billion years in the future — safe for modern systems.

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