Developer Rizz tool

Timestamp Converter

Unix epochs to human dates and back, no cap.

Convert Unix timestamps in seconds or milliseconds into readable dates, or parse recognized date strings into timestamps with a live clock.

How to use Timestamp Converter

Type a timestamp or a date string.
It auto-detects the format and converts, no thinking required.
Peep local, UTC, and relative times.

What this tool does

Unit detection

Uses the value’s magnitude to infer seconds or milliseconds; confirm the result when it matters.

Live epoch

Grab the current moment's timestamp in one tap. All gas.

Relative time

See how long ago (or how far ahead) a date is. It's giving context.

Common uses

Debug Unix timestamps from logs or APIs.
Convert a date into epoch seconds or milliseconds.
Compare local and UTC representations.

Processing and privacy

Browser processing: Date parsing, conversion, and display happen on the device.

Limitations to know

Date-string parsing depends on a recognizable format and can be ambiguous without a timezone.
Relative labels and the live clock depend on the device clock.

Keep original files where applicable, inspect the result, and do not rely on an automated output without checking that it fits your intended use.

Examples

Unix epoch

Input: 0 seconds

Output: 1970-01-01T00:00:00.000Z

Practical tips

Hit the "Now" button to instantly snag the current Unix timestamp in seconds. Effortless W.

Frequently asked questions

Why does my date look wrong?

Make sure you're looking at the right timezone block (Local vs UTC) — timestamps themselves have no timezone, so compare the displayed zone before assuming the conversion is wrong. 🫡

Related tools and guidance

Unit Converter — Convert length, weight, temperature, and more ✨

Read practical RizzKit guides for verification steps and workflows that combine related utilities.