How to convert a Unix timestamp
- Paste a timestamp (like
1752470400) into the top box — seconds or milliseconds are detected automatically. - Read the result instantly: local time, UTC, ISO 8601 and how long ago (or ahead) it is.
- To go the other way, pick a date and time below and copy the Unix seconds or milliseconds.
What is a Unix timestamp?
A Unix timestamp (also called epoch time) counts the seconds since January 1, 1970 at 00:00 UTC. Because it is a single number with no timezone attached, it is the standard way databases, APIs and log files store points in time. For example, 1752470400 corresponds to July 14, 2025 in UTC.
Seconds vs milliseconds
Some systems (Unix, most databases) use seconds, while JavaScript and many APIs use milliseconds — the same moment but a number 1,000× larger. This tool checks the size of your number: anything at or above 1e12 (a 13-digit value) is treated as milliseconds, everything smaller as seconds. Both give correct results for any modern date.
Is it private and safe?
Yes. All conversion happens with JavaScript inside your browser on your own device. Nothing you type is uploaded or logged anywhere, so your data stays completely private.
Frequently asked questions
What is a Unix timestamp?
It is the number of seconds elapsed since January 1, 1970 at 00:00 UTC — a compact, timezone-free way computers store dates.
How does it detect seconds vs milliseconds?
Values of 1e12 (1,000,000,000,000) or more are treated as milliseconds, smaller values as seconds. That threshold covers all realistic modern dates in both units.
Is my data uploaded?
No. All conversion happens locally in your browser and nothing is sent to a server.
Is it free?
Completely free, no sign-up and no limits.