How to use this tool
- Paste a Unix timestamp in seconds or milliseconds, or click Use current time.
- Review local time, UTC time, ISO string, seconds, and milliseconds.
- Use the date-time input when you need to create a timestamp from a readable date.
What you can use Timestamp Converter for
Convert Unix timestamps in seconds or milliseconds to local time, UTC time, ISO dates, and browser date-time values.
- Debugging API timestamps and webhook logs
- Converting database created_at values
- Checking JavaScript Date values in milliseconds
- Preparing sample timestamps for documentation or tests
Example workflows
| API log | Convert 1717171717 to a readable UTC and local date. |
|---|---|
| JavaScript Date.now() | Convert 13-digit millisecond values to ISO time. |
| Manual date | Pick a date and create seconds/milliseconds values. |
Seconds vs milliseconds
| Unix seconds | Usually 10 digits for current dates and common in many APIs, databases, and logs. |
|---|---|
| Milliseconds | Usually 13 digits for current dates and common in JavaScript Date.now values. |
| UTC | The global reference time used by many servers and logs. |
| Local time | The same moment displayed in your device timezone. |
Timestamp troubleshooting
If a converted date looks far in the past or future, check whether seconds were interpreted as milliseconds or milliseconds as seconds. For scheduling, also compare UTC and local time so timezone assumptions are clear.
JavaScript example
Date.now() returns milliseconds, while many server logs store seconds. If you paste a 13-digit JavaScript value into a seconds-only converter, the date will be wrong. Auto detect helps, but critical scheduling and analytics work should still confirm the expected unit from the source system.
Privacy and accuracy notes
This tool is built for fast everyday work in a browser. Review results before using them in production systems, financial decisions, legal documents, or other high-stakes workflows.
- Unix timestamps are timezone-neutral moments in time; displayed local time depends on your device timezone.
- Auto detect treats very large values as milliseconds and shorter values as seconds.
- Verify critical scheduling or legal deadlines with the source system.
Best practices for dependable results
Use clean input, review error messages, test important outputs in the destination app, and keep original files or text when the work matters. DailyWebTools keeps each tool page focused on one clear job so the result is easier to understand, repeat, and compare with related utilities.
FAQ
What is the difference between seconds and milliseconds?
Unix seconds are usually 10 digits for current dates, while JavaScript milliseconds are usually 13 digits.
Why does local time differ from UTC?
Local time uses your device timezone, while UTC is the global reference timezone.
Can I convert a date into a timestamp?
Yes. Choose a browser date-time value and click Date to timestamp.
Does the conversion need the internet?
No. Conversion runs in the browser.
Recommended guides
Use these related guides when the task needs examples, comparisons, platform checks, or a safer step-by-step workflow.
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