Unix timestamp converter

UTC date and time -
Local date and time -
Unix seconds -
Unix milliseconds -
ISO 8601 UTC -
Time zone -

The date field uses your browser time zone. Unix timestamps are moments in time and are shown in both UTC and local time.

See examples

API debugging

Paste a Unix timestamp from an API response and read the matching UTC and local date.

Database checks

Convert stored epoch seconds or milliseconds into a readable date before comparing records.

Create a timestamp

Choose a local date and time to generate Unix seconds, Unix milliseconds, and ISO UTC.

About this helper

Unix time counts seconds since January 1, 1970 at 00:00:00 UTC. This converter handles seconds and milliseconds, shows the same moment in UTC and your browser's local time zone, and can convert a local date and time back into Unix time.

Are timestamps uploaded?

No. The conversion runs in your browser and the site does not receive the timestamps or dates you type.

Should I use seconds or milliseconds?

Many APIs use 10-digit seconds, while JavaScript often uses 13-digit milliseconds. Choose the unit that matches your source.

Why do UTC and local time look different?

A Unix timestamp represents one moment. UTC and local time display that same moment in different time zones.