time tool
Unix Timestamp Converter
Paste a Unix timestamp and instantly see the equivalent UTC, ISO, local, second, and millisecond values.
Paste data here. It stays in your browser.
Copy-ready result appears here.
How it works
- Detects seconds vs milliseconds from the input length.
- Creates a browser Date object locally.
- Prints UTC, local, seconds, and milliseconds.
Common use cases
- Debug API timestamps.
- Check database epoch values.
- Compare logs from different systems.
Code example
new Date(1735689600 * 1000).toISOString()When to use this converter
Unix timestamps are common in APIs, logs, databases, queues, and analytics exports. Use this converter when you need to confirm whether a value represents seconds or milliseconds and compare it with ISO 8601 output.
Practical caution
Always confirm the unit before saving converted values. A seconds timestamp interpreted as milliseconds usually points to a date in 1970, while a millisecond timestamp interpreted as seconds points far into the future.
FAQ
Is my input uploaded?
No. This MVP runs tool logic in your browser and does not send tool input to a server.
Can I use this on mobile?
Yes. Pages are mobile-first and designed for quick copy, paste, and share workflows.
Does the tool store history?
No. The MVP does not store tool input history or create user accounts.
Should I verify important output?
Yes. These tools are designed for productivity, but production changes and financial decisions should be independently verified.
Can the tool run after the page loads?
Yes. The interactive logic runs in the browser once the static page and JavaScript island are loaded.
What input format should I use?
Use the examples on the page as a starting point, then replace them with your own local input.