Timestamp Converter
Convert Unix timestamps to dates and back, in seconds or milliseconds, with local, UTC, ISO and relative output.
Unit
Current time
—
—
01Timestamp or date
Enter a timestamp or date to see every conversion
This tool runs entirely in your browser. Your input is never uploaded.
How to use
- 1Choose whether the timestamp is in seconds or milliseconds
- 2Enter a timestamp, or paste a date string instead
- 3Copy the local, UTC, ISO or relative result you need
FAQ
Seconds or milliseconds?
Unix timestamps are usually 10 digits for seconds and 13 digits for milliseconds. Using the wrong unit produces a result off by a factor of 1000.
Which time zone is shown?
Local time uses your browser's time zone. UTC and ISO 8601 are shown alongside for cross-time-zone work.
Can I enter a date string?
Yes. Besides numeric timestamps, formats such as 2026-11-04 09:30:00 and RFC 2822 are parsed by the browser.
Related tools
Date Difference Calculator
Find the difference between two dates in days, weeks and calendar years, months and days — great for countdowns and project timelines.
Age Calculator
Calculate your exact age and total days from a birth date, plus a countdown to the next birthday.