About the Unix Timestamp Converter
A free, fully client-side tool for converting between Unix timestamps and human-readable dates.
What it is
The Computezy Unix Timestamp Converter is a free, browser-based tool that translates between Unix timestamps and human-readable dates — in both directions. A Unix timestamp is the number of seconds (or milliseconds) that have elapsed since the Unix epoch: midnight UTC on 1 January 1970. Timestamps are a standard, timezone-independent way to represent a point in time, used everywhere from API responses and database records to log files and JWT tokens.
Everything runs in your browser. No data is sent to a server, nothing is stored, and there are no accounts or rate limits.
Features
Two-Way Conversion
Enter a Unix timestamp to see the date it represents, or pick a date from the calendar to get its Unix timestamp. Either side updates the other instantly — no button to press.
Seconds & Milliseconds
Auto-detects whether your timestamp is in seconds (10 digits) or milliseconds (13 digits). You can also override the detection manually with the Seconds / Milliseconds toggle.
UTC & Local Time
Every result is shown in both UTC and your local timezone, clearly labelled with your detected timezone name and UTC offset — so you always know which is which.
ISO 8601 & Relative
Also shows the ISO 8601 string (e.g. 2023-11-14T22:13:20.000Z) and a human-friendly relative form ("3 days ago" or "in 2 hours").
Live Ticker
A live readout at the top of the page shows the current Unix timestamp ticking in both seconds and milliseconds. Copy it in one click with the Copy Now button.
Copy Buttons
Every output field has its own copy button — UTC string, local string, ISO 8601, seconds timestamp, and milliseconds timestamp — so you can grab exactly what you need.
Privacy
Timestamps can appear in logs and API responses that contain sensitive data. The Unix Timestamp Converter is fully client-side: it makes no network requests and stores nothing. You can verify this by watching the Network tab in your browser's DevTools — you'll see no outbound requests when you convert a timestamp.