Unix Timestamp (Epoch) Converter – Convert Epoch to Date & Date to Epoch (Free Online)

Unix Timestamp (Epoch) Converter – Epoch ↔ Date/Time

Use this free Unix Timestamp Converter to convert epoch seconds/milliseconds to a human-readable date/time and back. Supports UTC, time zones, and quick copy buttons. Everything runs in your browser.

Contents: Epoch → Date • Date → Epoch • FAQ

Epoch → Date

Epoch value Enter seconds or milliseconds

Unit Seconds Milliseconds

Time Zone (for display)

Auto-detects seconds vs ms if the number is very large.

Date/Time:

ISO 8601:

Local device time:

UTC:

Weekday:

Relative:

Date → Epoch

Date & time If blank, use Now

Interpret as Local device time UTC

Epoch (seconds):

Epoch (milliseconds):

ISO 8601 (UTC):

Why Use This Epoch Converter?

• Seconds & Milliseconds – convert both directions.
• Time Zones & UTC – display results in your chosen zone.
• Copy fast – one-click copy for ISO/epoch outputs.
• Private – 100% client-side; nothing uploaded.

FAQ – Unix Timestamp (Epoch) Converter

What’s the difference between seconds and milliseconds?

Epoch seconds count in whole seconds; milliseconds have three extra digits. Example: 1724371200 (s) ↔ 1724371200000 (ms).

Why does the same epoch show different local times?

The epoch is absolute (UTC). Local time depends on your time zone and daylight saving rules.

Can I input a date/time in a specific time zone?

You can interpret input as Local device time or UTC. For other zones, convert their local time to UTC first, then use this tool.