How Browser-Based Unix Epoch Conversion Works
Unix Epoch & Timestamp Converter runs entirely in your browser with JavaScript. There is no sign-up, and whatever you type or open here is processed on your device instead of being sent to a server.
Convert Unix Timestamps to Human-Readable Dates Instantly
Unix timestamps represent the number of seconds (or milliseconds) elapsed since January 1, 1970 UTC. This converter instantly translates raw timestamps into readable ISO 8601 strings, UTC dates, and your local timezone without contacting external servers.
Supports Seconds and Milliseconds
Modern application logs and databases use varying timestamp granularities. The converter automatically detects 10-digit second timestamps and 13-digit millisecond timestamps, and shows how long ago or how far ahead the date is, such as '3 days ago'. Microsecond (16-digit) and nanosecond (19-digit) timestamps are not detected; divide them by 1,000 or 1,000,000 before converting.
Convert Custom Calendar Dates to Epoch Seconds
Pick any calendar date and time to calculate its exact Unix epoch value in seconds and milliseconds. Perfect for database queries, API development, and cron schedule configuration. The date-to-timestamp picker reads the date and time in your device's local time zone, so allow for your UTC offset when you need the epoch of a UTC time.
Why processing in your browser matters
Many online tools upload your files or text to a server to process them. This one does the work on your computer or phone, so your data is not sent to us or stored anywhere else. That lowers the risk when you work with confidential material, although you should still follow your organisation's own rules. Read how this works in our Privacy Policy.
- No uploads: files are opened and saved on your device, so there is no upload or download wait.
- No account: nothing to sign up for or install.
- Free to use: no subscriptions or paywalls.