Unix Timestamp Converter
Convert between Unix timestamps and human-readable dates.
Processed locally in your browser. Nothing you enter is uploaded or stored.
- Handles both seconds and milliseconds, and shows the result in local time and UTC.
- Converts in both directions — timestamp to date, or date to timestamp.
- Runs in your browser.
Why this is private
- Processed locally in your browser. Nothing you enter is uploaded or stored.
- Open your browser's DevTools → Network tab while using this tool — you won't see a request carrying your input, because it never leaves your device.
- Nothing you enter is uploaded to a server or shared with us — the processing happens entirely on your device.
Overview
Converts a Unix timestamp (seconds or milliseconds since 1 Jan 1970 UTC) to a human-readable date, and back.
How to use it
- 1Enter a timestamp, or click "Now" to use the current time.
- 2The date is shown in your local timezone and UTC.
- 3Or enter a date to get its timestamp.
Formula
Timestamp to date
date = new Date(timestamp * 1000)
Multiply by 1000 when the timestamp is in seconds, not milliseconds.
Frequently asked questions
What people use it for
Read a timestamp from a log or databaseTurn `1735689600` into a readable date while debugging.
Check a JWT or cookie expiryConvert an `exp` value to see exactly when a token lapses.
Build a date filter for an APIGet the epoch value for a specific date to pass as a query parameter.
Confirm seconds vs millisecondsA 13-digit number is milliseconds; 10 digits is seconds — the tool shows which gives a sane date.
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Unix Timestamp Converter