Common use cases
- Log analysis
- Turn raw event times into readable dates.
- API debugging
- Check timestamp fields in JSON payloads.
- Token inspection
- Convert JWT exp and iat claims.
Development · free tool
Unix timestamp converter for logs, APIs and debugging
Convert Unix timestamps to readable dates and dates back to Unix time.
Your tool
Timestamp Converter
Use it well
How to use Timestamp Converter
Steps
- Enter a date or timestamp.
- Choose seconds or milliseconds.
- Review the converted value.
- Copy the output for your logs or API payload.
Limits and good practices
Good practices
- Use realistic test values when validating forms, exports or API payloads.
- Keep real customer, banking and production secrets out of public tools.
- Check the output format before copying it into a production workflow.
- Document whether a value is generated, validated, converted or only estimated.
Common mistakes
- Confusing valid format with real-world validity
- A generated or locally validated value can match a format without proving that it exists in an official system.
- Using real production data
- Public utilities are best for test data, demos, fixtures, QA and quick checks, not for confidential values.
FAQ
Frequently asked questions
What is Unix time?
Unix time counts elapsed seconds from January 1, 1970 at 00:00:00 UTC.
How do I know if a timestamp is seconds or milliseconds?
Millisecond timestamps are usually 13 digits, while second timestamps are usually 10 digits.
Does timezone change the timestamp?
The timestamp represents a fixed instant. Timezone changes only the human-readable display.
Are my inputs sent to a server?
OnSubmit tools run in the browser whenever the task can be processed locally. Avoid pasting production secrets, real banking details or personal data into public tools.