Unix Timestamp Converter
④ API / Debug
What it is: A timestamp is the number of seconds (or milliseconds) since 1970 — a common way programs represent time. Convert it to and from human-readable dates here.
When to use: When an API returns a number for a time, or you need to turn a date into a timestamp for storage.
Everything runs locally in your browser — nothing is uploaded.
FAQ
Is the timestamp in seconds or milliseconds?
Both exist: 10 digits is usually seconds (e.g. 1720000000), 13 digits is milliseconds (e.g. 1720000000000). This tool auto-detects and parses each accordingly.
Why is the result off by a few hours from what I expected?
It is almost always a timezone difference. The tool shows both a "local time" and a "UTC" result — use whichever timezone you need.