Date & Time

Unix Timestamp Converter

Convert seconds or milliseconds since the Unix epoch into ISO, UTC, and local date formats—or convert a date back to a timestamp.

Converted time
Your result will appear here.
Processed locally in this browser. Your input is not sent to DevKitly.

What is Timestamp Converter?

A Unix timestamp counts time since 1 January 1970 00:00:00 UTC. Values with 10 or fewer digits are read as seconds; longer values as milliseconds. You can also enter a date such as 2026-01-01T00:00:00Z to get its timestamp.

How to use Timestamp Converter

  1. Paste your input into the editor above, or select Sample to load an example.
  2. Select Convert time. If the input cannot be processed, a message explains what to fix.
  3. Use Copy or Download to take the result with you, and Clear to start again.

Example

Input

1700000000

Output

ISO 8601: 2023-11-14T22:13:20.000Z
UTC: Tue, 14 Nov 2023 22:13:20 GMT
Unix seconds: 1700000000
Unix milliseconds: 1700000000000

Practical use cases

  • Read API timestamps
  • Debug log times
  • Create epoch values

Common problems

  • Confusing seconds and milliseconds
  • Ignoring time zones
  • Passing an ambiguous date string

Frequently asked questions

Is Unix Timestamp Converter free to use?

Yes. Unix Timestamp Converter is free and does not require an account.

Does my input leave the browser?

No. This tool performs its processing locally in your browser and does not need to upload your input.