Unix Timestamp Converter
Convert Unix timestamps to human-readable dates and back — with UTC or local time, relative time, ISO 8601 / RFC formats, second and millisecond support, and batch conversion.
1782284433About the Unix Timestamp Converter
Updated June 2026 · 100% client-side — your data never leaves your browser.
A Unix timestamp counts the number of seconds (or milliseconds) since the Unix epoch — 00:00:00 UTC on 1 January 1970. Bytewrench's converter turns timestamps into human-readable dates and converts dates back into timestamps, showing both UTC and your local time zone.
It's the quickest way to debug log lines, API responses and database fields that store time as an integer.
See also: Cron expression parser, Age calculator
Convert a timestamp to a date, or pick a date to get its timestamp.
See both the UTC value and your local-time equivalent side by side.
Handles both second- and millisecond-precision timestamps.
View the current Unix time updating in real time for quick reference.
Frequently asked questions
What is a Unix timestamp?
It's the number of seconds elapsed since the Unix epoch — 00:00:00 UTC on 1 January 1970 — used widely in programming, logs, APIs and databases to represent a point in time as a single integer.
Seconds vs milliseconds — how do I tell them apart?
Count the digits. A seconds-based timestamp for a current date is 10 digits; a millisecond timestamp (used by JavaScript's Date.now()) is 13 digits. If a value looks 1000× too large, it's probably in milliseconds. This tool detects and handles both.
How do I convert epoch to a date in SQL or JavaScript?
In JavaScript: new Date(seconds * 1000) (multiply because JS expects milliseconds). In PostgreSQL: to_timestamp(epoch). In MySQL: FROM_UNIXTIME(epoch). All interpret the value as seconds since the UTC epoch.
What is the year 2038 problem?
Systems that store Unix time in a signed 32-bit integer can only count to 2,147,483,647 seconds, which overflows on 19 January 2038 and wraps to a negative date. Modern systems use 64-bit timestamps, which push the limit hundreds of billions of years out.
What time zone is a timestamp in?
A Unix timestamp is always based on UTC and carries no time-zone information itself. This converter shows both the UTC date and your local-time equivalent.