Epoch / Timestamp Converter
Unix time ↔ human-readable date.
Pick a date and time to get its timestamp.
Runs entirely in your browser — nothing you enter is uploaded or sent to a server.
A Unix timestamp is timezone-independent; the local time shown uses your device's timezone, so double-check the zone whenever a specific date and time really matters. Read our full disclaimer.
About this tool
A Unix timestamp is the number of seconds (or milliseconds) since 1 January 1970 UTC — the way computers store time. This tool converts a timestamp into readable dates (ISO 8601, UTC, and your local time) and converts a date back into a timestamp.
Try it
The timestamp 1700000000 (seconds) is 2023-11-14T22:13:20Z. Midnight on 2021-01-01 UTC is 1609459200.
How to use
- 1Enter a Unix timestamp — the tool auto-detects seconds vs milliseconds.
- 2Read the ISO, UTC, and local date, plus a human-relative time.
- 3Or pick a date and time to get its timestamp in seconds and milliseconds.
Features
- Two-way: timestamp → date and date → timestamp.
- Seconds or milliseconds, detected automatically.
- ISO 8601, UTC, and local output, plus a relative time.
- One-click copy of any value.
Frequently asked questions
What's the difference between seconds and milliseconds?
A 10-digit timestamp is usually in seconds; a 13-digit one is in milliseconds. The tool guesses based on the magnitude, and you can override it.
Which timezone is used?
It shows UTC and your browser's local time. Timestamps themselves are timezone-independent — they always count from 1970 UTC.
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