Unix epoch converter
Free to use, with no sign up. Everything runs in your browser and nothing is uploaded.
Current Unix time
Seconds:
Milliseconds:
Enter a timestamp or a date to convert it.
| Epoch seconds | ||
|---|---|---|
| Epoch milliseconds | ||
| UTC | ||
| In the chosen zone | ||
| Weekday there | ||
| UTC offset there |
Uses your browser's built-in Intl time zone data. No third-party code or licence applies.
How to use this tool
Paste a Unix timestamp or type a date such as 2024-03-10 14:30, pick a time zone, and read the result. Press a Copy button to copy any value.
Frequently asked questions
What is a Unix timestamp?
It is the number of seconds since 1970-01-01 00:00:00 UTC, called the Unix epoch. Many systems and programming languages store times this way because it is one number with no time zone in it.
How does it tell seconds from milliseconds?
By size. A number of 100,000,000,000 or more is read as milliseconds, which is any date after March 1973. Smaller numbers are read as seconds, which covers dates up to the year 5138. The result says which one it used.
Which date formats can I type?
ISO 8601 style: 2024-03-10, 2024-03-10 14:30, 2024-03-10T14:30:15.250 or with a Z or an offset such as +05:30. A date with no offset is read in the time zone you picked. Anything else is rejected rather than guessed.
What happens at a daylight saving change?
A clock time that happens twice, when clocks go back, uses its first occurrence. A clock time that never happens, when clocks go forward, moves forward to the first real time after the gap.
Does my input leave my device?
No. The conversion runs in your browser with the built-in date and time zone tools, and nothing is sent anywhere. It is free, with no sign up.
API Tool Calls MCP
Use it from an AI agent
This tool is also an MCP tool named epoch_convert at https://apitoolcalls.com/mcp.
Agent tools are free: 20 calls a day per IP, no key needed.
Example tools/call arguments:
{"name":"epoch_convert","arguments":{"value":1710000000,"tz":"America/New_York"}}