Unix Timestamp Converter
Turn any Unix timestamp into a readable date — or a date into its timestamp — with automatic detection of seconds, milliseconds and ISO strings. A live clock shows the current epoch time.
| Event | Date (UTC) | Unix seconds |
|---|---|---|
| Unix epoch begins | 1970-01-01T00:00:00Z | 0 |
| Y2K begins | 2000-01-01T00:00:00Z | 946684800 |
| 1 billion seconds since 1970 | 2001-09-09T01:46:40Z | 1000000000 |
| 32-bit limit ("2038 problem") | 2038-01-19T03:14:07Z | 2147483647 |
How to use
- Paste a Unix timestamp (in seconds or milliseconds) or a date string into the input.
- The tool detects the format automatically and converts it live — no button needed.
- Read the result as Unix seconds, milliseconds, UTC, ISO 8601 and your local time.
Frequently asked questions
What is a Unix timestamp?
A Unix timestamp is the number of seconds elapsed since 1 January 1970 00:00:00 UTC, known as the Unix epoch. It gives every system a single, timezone-independent way to store points in time, which is why databases, APIs and log files rely on it so heavily.
How do I know if my timestamp is in seconds or milliseconds?
Look at the digit count. A value with 10 digits or fewer is almost always seconds (until the year 2286), while 11 to 13 digits means milliseconds. This tool applies exactly that rule: values up to 10 digits are read as seconds, and 11–13 digit values are read as milliseconds automatically.
Why does the 2038 problem matter?
Many older systems store timestamps as a signed 32-bit integer of seconds, which reaches its maximum value 2,147,483,647 on 19 January 2038 at 03:14:07 UTC. One second later the counter overflows and can wrap to a negative date. Modern 64-bit systems are unaffected, but embedded and legacy software may need fixes before then.
Is my conversion sent to a server?
No. Every calculation happens in your browser with the built-in Date object, and the live clock runs entirely on your device. Your timestamps and dates are never uploaded, stored or logged, so you can safely convert times from private logs, databases or production systems.
What date formats can I paste?
You can paste a plain Unix timestamp in seconds or milliseconds, or any date string the browser can parse — for example 2024-01-15, 2024-01-15T09:30:00Z or a full ISO 8601 stamp with offsets. If the input is neither all digits nor a parseable date, the tool tells you immediately instead of guessing.