Unix Timestamp Converter — Epoch to Date and Back

What you can do

• •Epoch seconds and milliseconds
• •Local, ISO 8601, and UTC output together
• •Date string back to epoch
• •Automatic seconds-or-milliseconds detection

How it works

1. 1

   Enter a value

   Paste a Unix timestamp or a date string.

2. 2

   Read outputs

   See local, ISO, UTC, and epoch forms.

3. 3

   Copy

   Copy the block you need.

Common uses

• •Debug API timestamps
• •Convert logs to local time
• •Share epoch ↔ ISO values
• •Check a token or cookie expiry

Frequently asked questions

What is a Unix timestamp?

The number of seconds elapsed since 1 January 1970 at 00:00:00 UTC, known as the Unix epoch. Because it is a plain integer in UTC, it avoids time-zone and formatting ambiguity in logs and APIs.

Seconds or milliseconds?

Numeric values under 1e12 are treated as seconds; larger values as milliseconds. In practice a 10-digit number is seconds and a 13-digit number is milliseconds. Both forms are shown in the output so you can confirm the reading.

Which time zone are the results in?

Four views at once: Local uses your device’s time zone, ISO 8601 and UTC are both zone-independent, and the epoch values are UTC by definition. Timestamps themselves carry no time zone.

What date formats can I paste in?

ISO 8601 such as 2026-09-25T10:30:00Z is the safest. Other formats your browser recognises usually work, but ambiguous ones like 03/04/2026 may be read differently across regions — prefer ISO when it matters.

Is this an epoch / timestamp converter?

Yes. Convert Unix epoch to a human-readable date and back again, in either direction, for debugging APIs, logs, databases, and expiry fields.

Is my input uploaded?

No. Conversion runs in your browser. Nothing is sent to a NeedAnyTool server for these tools.

Related tools

• Number Base Converter — Hex, Bin, Oct, Dec
• Unit Converter — Length, Weight, Temperature
• Date Difference Calculator

Related guides

• Convert Unix timestamps online