Date and developer tool
Unix timestamp converter
Parse Unix seconds, Unix milliseconds, ISO-like dates, or browser-readable date input and inspect local, UTC, Unix-seconds, and Unix-milliseconds output. You can also calculate the exact elapsed time between two dates.
Unix seconds and milliseconds represent elapsed time from the Unix epoch. Check the unit when copying a timestamp between systems.
How to convert a Unix timestamp
- Enter a value or date. Use Unix seconds, Unix milliseconds, an ISO-like value, or a supported date-time format.
- Choose the assumption for timezone-free input. The tool can interpret a timezone-free value as local time or UTC.
- Read the outputs. Compare readable local and UTC dates with Unix seconds, Unix milliseconds, and optional range calculations.
Timestamp tool features
- Unix seconds and millisecond detection.
- Local and UTC readable output.
- Relative-time summary.
- ISO-like and common date-time parsing.
- Elapsed days, hours, minutes, and seconds between two dates.
- Copyable conversion summary.
Timestamp FAQ
Common questions
How do I tell seconds from milliseconds?
Unix seconds are typically around ten digits for current dates, while Unix milliseconds are typically around thirteen digits. Aegis uses the magnitude of a numeric input to choose between the two interpretations.
What is the Unix epoch?
It is the reference point used by Unix time: 1970-01-01 00:00:00 UTC. A timestamp counts elapsed time from that point in seconds or milliseconds.
Can I compare two dates?
Yes. The interactive tool includes start and end fields and reports the elapsed range in days, hours, minutes, and seconds.
Does the converter need a server?
No. Parsing and formatting use browser date APIs and run locally.