Unix Timestamp Converter
Convert Unix timestamps to readable dates and back again.
Timestamp input
10 digits usually means seconds. 13 digits usually means milliseconds.
Converted date
Show both local and UTC output to reduce confusion.
Enter a timestamp to begin.
Common use cases
- Debugging backend logs quickly
- Preparing timestamp examples for docs
- Checking whether a value is in seconds or milliseconds
FAQ
How do I know if a timestamp is in seconds or milliseconds?
Values with 13 digits are usually milliseconds, while 10-digit values are usually Unix seconds.
Does the tool support future dates?
Yes. Any valid JavaScript date value that can be derived from the timestamp will render.
How it works
Translate seconds or milliseconds into human-readable times, compare local offsets, and generate fresh timestamps. The result is produced immediately so you can review it before copying or using it elsewhere.
Privacy
The tool is designed to process ordinary input in your browser. Avoid pasting passwords, private keys, access tokens, personal records, or other sensitive production data into any online utility.
Limitations
This utility handles the focused workflow described on this page. Check the result before production use, especially when an input depends on a vendor-specific format, security rule, or external standard.