⏱ Unix Timestamp Converter
Convert epoch time to a readable date and back — in seconds or milliseconds, local or UTC — with ISO 8601, relative time and calendar insights. Free, instant & 100% private.
More Than a Converter
Every format and fact a developer needs to make sense of a moment in time — in one fast, private page.
Two-Way Conversion
Timestamp → date and date → timestamp, in one place — with seconds, milliseconds and auto-detection.
Live Current Epoch
A ticking current Unix time in seconds and milliseconds, with one-tap copy for 'now'.
Local, UTC & ISO
See every important format at once: your timezone, UTC, ISO 8601, RFC, and relative time.
Calendar Insights
Day of week, day of year, ISO week number, quarter, leap-year status and days in the month.
Time Progress Bars
Visual through-the-day and through-the-year progress make an abstract timestamp tangible.
Private & Free
100% in your browser — nothing uploaded. No login, no limits, dark mode, responsive to 280px.
How to Use the Timestamp Converter
Four steps — everything updates the moment you type.
Grab the current epoch
The live counter at the top shows 'now' in seconds and milliseconds — tap to copy it instantly.
Convert a timestamp
Paste any Unix timestamp; it auto-detects seconds vs milliseconds and shows the date right below.
Or convert a date
Pick a date and time, choose local or UTC, and read off the matching timestamp in seconds and ms.
Read the details
Copy any format with a tap, and check calendar facts and day/year progress for the chosen instant.
Frequently Asked Questions
What a Unix timestamp is, seconds vs milliseconds, converting both ways, why time starts in 1970, and the Year 2038 problem.
What is a Unix timestamp?
A Unix timestamp (also called epoch time or POSIX time) is the number of seconds that have elapsed since 00:00:00 UTC on 1 January 1970 — a moment known as the Unix epoch. Because it's a single number in a fixed timezone, it's the simplest, most universal way for computers to store and compare a point in time.
How do I convert a timestamp to a date?
Paste the number into the 'Timestamp → Date' box. The tool auto-detects whether it's in seconds or milliseconds, then shows the human-readable date in your local timezone and UTC, plus ISO 8601, relative time and calendar facts. You can also force seconds or milliseconds with the toggle if the auto-detection guesses wrong.
What's the difference between seconds and milliseconds?
Unix time is traditionally counted in seconds, which is a 10-digit number today (around 1.7 billion). Many programming languages — notably JavaScript — use milliseconds instead, giving a 13-digit number. A quick rule: 10 digits is seconds, 13 digits is milliseconds. The converter detects this automatically from the length.
How do I convert a date to a Unix timestamp?
Use the 'Date → Timestamp' box and pick a date and time. By default it's read in your local timezone; switch the toggle to UTC to interpret it as universal time. The tool then shows the matching timestamp in both seconds and milliseconds — tap either to copy it.
What is the current Unix timestamp?
The live counter at the top of this page shows the current Unix time, ticking every second in both seconds and milliseconds. Tap either value to copy it instantly — handy when you need 'now' as an epoch for an API, a database record or a token.
Why does Unix time start in 1970?
When Unix was being built at Bell Labs in the early 1970s, engineers needed a simple zero point for counting time. They settled on the start of 1970 — a recent, round date — and time has been counted in seconds from there ever since. It's an arbitrary but enduring choice now baked into virtually every computer system.
What is the Year 2038 problem?
Systems that store Unix time in a signed 32-bit integer can only count up to 2,147,483,647 seconds, which is reached at 03:14:07 UTC on 19 January 2038. After that the number overflows and wraps around to 1901. The fix is to use 64-bit integers, which modern systems already do — but some legacy and embedded devices remain at risk.
Is this converter accurate and private?
Yes. All conversions happen in your browser using the standard date engine, with no rounding tricks, and nothing you enter is sent anywhere. Times are shown in your device's own timezone for the local view and in UTC for the universal view, so you always see both.