Convert Unix timestamps
Convert Unix seconds or milliseconds to a readable date, or a date to epoch time. Choose UTC or another time zone.
From open to done.
Choose your input
Paste epoch seconds or milliseconds, or choose a calendar date.
Make it yours
Select a display time zone and convert.
Take it with you
Copy the ISO date, readable date, or timestamp you need.
Get a better result.
Unix time counts from 1970-01-01T00:00:00Z. The same instant can display as different local dates in different zones. Automatic unit detection uses magnitude; select the unit explicitly for early dates or unusually small millisecond values. Some daylight-saving dates are ambiguous.
Timestamp 0 in seconds is 1970-01-01T00:00:00.000Z. In a time zone west of UTC, its displayed calendar date may be December 31, 1969.
Made for your everyday work
Processed entirely on your device
Free to use, with no signup
Copy or download your result
Works in a modern browser
When this helps
Interpret logs, check expiration fields, or build test timestamps. Use ISO output when you need an unambiguous UTC representation to share with another developer.
A little more clarity.
What to know before you go.
Does Unix time depend on my time zone?
The timestamp represents an instant independent of the display zone. The readable date depends on the selected zone.
How are milliseconds detected?
Large magnitudes are treated as milliseconds in Auto mode. Use the explicit unit control to avoid ambiguity.
Can I convert a date back to epoch?
Yes. Enter a date and time interpreted in the selected zone, then convert.
What happens at a daylight-saving transition?
Some wall-clock times do not exist or occur twice. Nonexistent times are rejected; ambiguous times use the matching offset found by the converter.
Your next useful thing.
JSON Formatter
Format, minify and validate JSON.
Developer toolUUID Generator
Generate UUID v1, v4 or v7, individually or in bulk.
Developer toolBase64 Encode / Decode
Convert UTF-8 text or files to Base64, and decode them back.
Developer toolWord Counter
Count words, characters, sentences and paragraphs as you type.
Text tool