Unix Timestamp Converter
Unix Timestamp Converter changes Unix (epoch) time — the number of seconds or milliseconds since January 1, 1970 — into a human-readable date, and converts dates back into a timestamp. It automatically detects whether a pasted value is in seconds or milliseconds and lets you switch between the two. Results can be displayed in any timezone you choose. The whole conversion happens client-side in your browser — no upload, no account, no signup needed.
Timestamp → Human
Detected as seconds
Human → Timestamp
Frequently asked questions
Is a Unix timestamp measured in seconds or milliseconds?
Traditionally it is seconds, but many modern systems, including JavaScript, use milliseconds; this tool auto-detects which one you pasted and lets you switch between the two.
What date does a Unix timestamp of 0 represent?
Timestamp 0 is the Unix epoch, January 1, 1970 at 00:00:00 UTC — the reference point every Unix timestamp counts from.
How do I convert a date into a Unix timestamp?
Enter the date and time and pick a timezone, and the tool outputs the matching epoch value in both seconds and milliseconds.
Can a Unix timestamp be negative?
Yes — a negative value represents a date before January 1, 1970, and this tool converts it the same way it handles positive timestamps.
How is Unix Timestamp Converter different from Timezone Converter?
Unix Timestamp Converter translates between epoch numbers and calendar dates, while Timezone Converter translates a calendar date and time from one time zone into another without touching the timestamp format.