Epochly: Time & Date Tools
Convert timestamps, calculate date differences, check time zones, and more — free, fast online time and date tools. No sign-up required.
Timestamp → Date
Paste a Unix timestamp — seconds or milliseconds, auto-detected.
Enter a timestamp above to convert it.
Date → Timestamp
Pick a date and time in your local timezone.
Pick a date above to convert it.
About epoch & Unix time
Where "epoch time" comes from
A Unix timestamp counts the seconds that have passed since midnight UTC on January 1, 1970 — a fixed moment computer scientists call the Unix epoch. Every timestamp since is just "seconds since that moment," which makes it trivial to store, sort and compare without ever parsing a calendar string.
Why seconds and milliseconds get mixed up
Unix systems and most databases count in whole seconds — a 10-digit number today. JavaScript's Date object and many web APIs count in milliseconds instead — 13 digits. Feed the wrong unit into the wrong system and you'll land somewhere in 1970, or overflow thousands of years into the future. This converter auto-detects which one you've pasted so you don't have to.
When you'll actually need this
Reach for it when an API response hands you a raw timestamp field, when you're debugging a log that stores created_at as an integer, when a token's exp claim needs checking, or when you just want to confirm what a given Unix time actually means in your local timezone.
Quick answers
What is a Unix timestamp?
It's the number of seconds that have passed since midnight UTC on January 1, 1970 — the "Unix epoch". It's a single number, so it's easy to store, sort and compare without parsing a calendar date.
How do I know if my timestamp is in seconds or milliseconds?
A 10-digit number (like 1757001234) is almost always seconds; a 13-digit number is milliseconds. This converter auto-detects which one you've pasted, or you can force either with the unit dropdown.
Does this tool send my data anywhere?
No. Every conversion runs in your browser with JavaScript's built-in Date object — nothing you type is stored or sent to a server.
What is the Year 2038 problem?
Older systems store Unix time as a signed 32-bit integer, which runs out at 03:14:07 UTC on January 19, 2038. Most modern software already uses 64-bit timestamps, which push that limit out billions of years.