Tools › Unix Timestamp Converter
Unix Timestamp Converter
Convert Unix timestamps to human-readable dates and back. Handles seconds and milliseconds automatically, shows ISO 8601, UTC and relative time.
Use it from code
The same function is available as an API endpoint. Free tier: 100 calls per day without a key. Pro lifts the limit.
curl -X POST https://spincrus.uz/api/v1/tools/timestamp-converter \
-H "content-type: application/json" \
-H "x-api-key: YOUR_KEY" \
-d '{"value":"1700000000","unit":"auto"}'FAQ
How do I know if my timestamp is in seconds or milliseconds?
Unix timestamps in seconds have 10 digits or fewer until the year 2286; 13-digit values are milliseconds. Leave the unit on "auto" and it is detected from the number of digits.
What timezone are the results in?
The ISO 8601 and UTC fields are always in UTC. Convert the UTC value in your own timezone-aware code if you need local time.
Can I convert a date back into a Unix timestamp?
Yes, paste any parseable date such as "2026-09-21" or "September 21, 2026" and it returns the equivalent Unix timestamp in seconds and milliseconds.
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