Timestamp Converter

Convert Unix timestamps, milliseconds and ISO 8601 dates instantly.

Runs locally in your browser. Your input is never sent anywhere.

Input

Output

Enter a timestamp or date to see conversions.

Accepts Unix seconds, Unix milliseconds, ISO 8601, and the formatted dates this tool outputs. Ambiguous formats like 07/09/2026 are rejected rather than guessed.

Current Unix time

Seconds —

Milliseconds —

What is a Unix timestamp?

A Unix timestamp is the number of seconds that have elapsed since 00:00:00 UTC on 1 January 1970, ignoring leap seconds. It is timezone-independent, which is why it is the usual way to store and transmit an instant in time.

Seconds or milliseconds?

Unix tools, Go and most databases use seconds. JavaScript, Java and most JSON APIs use milliseconds. A present-day value is 10 digits in seconds and 13 in milliseconds, which is how this tool tells them apart.

Seconds: 1788794072
Milliseconds: 1788794072000

A note on ISO 8601 and timezones

2026-09-07T15:14:32Z ends in Z, so it is UTC. Without an offset — 2026-09-07T15:14:32 — JavaScript treats it as local time, while a date-only value like 2026-09-07 is treated as UTC. This tool preserves that behaviour so results match what your own code does.