Unix timestamp converter
Convert Unix seconds or milliseconds to readable dates and ISO dates back to Unix time.
Tue, 14 Nov 2023 22:13:20 GMT
Guide
Unix Timestamp Converter: what it does and how to use it
What this Developer tool does
This converter turns Unix timestamps into readable dates and converts ISO dates back to epoch time. Unix timestamps appear in logs, APIs, JWT claims, databases, analytics exports, and scheduled jobs.
How it works
Enter seconds or milliseconds since the Unix epoch and convert it to ISO/UTC output. You can also paste an ISO date and convert it back to Unix seconds. The tool guards invalid or extreme dates so malformed input does not break rendering.
Examples
- Decode a JWT exp claim.
- Convert an API timestamp while debugging.
- Create test data with a known future date.
Security considerations
All conversions are local. Be careful when copying production log data that may contain user identifiers or private event details.
FAQ
Seconds or milliseconds?
Most Unix timestamps are seconds, while JavaScript timestamps are usually milliseconds.
What is UTC?
UTC is the standard timezone used for unambiguous server and API timestamps.
Why is my date invalid?
The number may be outside the date range supported by JavaScript.