Convert time in three steps
1. Paste a timeEnter one timestamp or paste a complete application log.
2. Choose a timezoneDefine timezone-free input and select an output timezone.
3. Copy the resultGet Unix, ISO, UTC, local time or an annotated log.
Developer Utility
Unix Timestamp Converter — Seconds and Milliseconds
Detect Unix seconds, milliseconds, microseconds, nanoseconds, ISO 8601 and Apache log times, then convert them to any IANA timezone.
Everything stays in your browser
Convert one timestamp
Paste a timestamp or date and press Enter.
Examples:
Conversion settings
Choose how timezone-free input is interpreted and where results are displayed.
Supported formats
10, 13, 16 and 19-digit Unix timestamps, ISO 8601, Java, RFC 2822, Apache/Nginx, syslog and YYYY-MM-DD HH:mm:ss.
10, 13, 16 and 19-digit Unix timestamps, ISO 8601, Java, RFC 2822, Apache/Nginx, syslog and YYYY-MM-DD HH:mm:ss.
Convert timestamps inside logs
Keep the original text and append the converted time after every detected timestamp.
Common uses
Backend and API debugging
Understand epoch values returned by databases, JWTs and APIs.
Cross-region log analysis
Convert UTC and Apache logs into your team's timezone.
Format verification
Compare seconds, milliseconds and ISO 8601 to catch unit mistakes.
Frequently asked questions
A traditional Unix timestamp counts seconds since 1970-01-01 UTC, while JavaScript often uses milliseconds. This tool detects common 10, 13, 16 and 19-digit values.
The default is UTC so that results do not change between computers. Choose browser local time when you know the source log was written in local time.
No. Detection and conversion run in JavaScript inside your browser. Your input is not sent to a server.
How do I convert a Unix timestamp to a date and time?
Enter the timestamp in the shared input; the tool detects the numeric time unit. Read the detected precision and the converted date together with the selected output time zone.
Can I convert epoch milliseconds in a selected time zone?
Yes. Enter the millisecond value in the same input and select the output time zone. A Unix timestamp represents an instant; the zone changes the displayed local time.