Unix timestamp converter
Convert Unix timestamps to UTC dates and ISO 8601 dates back to timestamps.
Processed on your device. Your files are never uploaded. · Free · No signup
Three steps. That’s all.
Choose the direction and seconds or milliseconds, then enter a value.
Adjust the options and review the result.
Copy or use the result directly.
A little more about this tool
Convert Unix timestamps to UTC dates and ISO 8601 dates back to timestamps. Unix time counts from 1 January 1970 UTC. Date input must include Z or a UTC offset; date output is normalized to UTC.
Why this tool is useful
- Inspect or transform data without sending it to a remote service.
- Use it for free without creating an account.
- Use the same focused interface on mobile or desktop.
Good to know
What should I know before using Unix timestamp converter?
Unix time counts from 1 January 1970 UTC. Date input must include Z or a UTC offset; date output is normalized to UTC.
Does my input leave my device?
No. This tool processes your input in your browser. It does not send your files or entered content to a conversion service.
Do I need an account or a subscription?
No account, payment or subscription is required. Device memory and browser capabilities may limit large operations.