How does the tool know if a timestamp is in seconds or milliseconds?
Timestamps with 10 digits are automatically detected as seconds, while 13-digit numbers are treated as milliseconds.
Converters
Convert Unix timestamps and ISO dates locally.
Add an input and run this tool to see the output.
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Timestamp Converter Developer Guide
100% Client-Side & PrivateTranslate Unix timestamps and ISO dates while debugging logs, API responses, event payloads, and scheduling data.
Key capabilities
- Bidirectional conversion between Unix timestamps (seconds & milliseconds) and ISO 8601 dates
- Live 'current timestamp' counter with one-click capture
- Displays dates in both UTC and your browser's local time zone with relative time signals
- Handles negative timestamps for historical dates prior to 1970
Common use cases
- Converting database epoch timestamps found in server logs and API responses
- Debugging JWT expiration (exp) and issued-at (iat) timestamp claims
- Constructing date filters and query ranges for time-series metrics and analytics
How to use Timestamp Converter
- Enter a 10-digit (seconds) or 13-digit (milliseconds) Unix timestamp or an ISO date string
- Review the corresponding UTC date, local time, and elapsed relative duration
- Click to copy any converted format directly