Is the unix timestamp converter free?

Yes — 100% free, no signup, no usage limits.

Does it save my data?

No. Inputs are processed in your browser and never uploaded to a server.

Yes. The interface is fully responsive and works on iOS and Android.

Unix timestamps are typically in seconds (10 digits today). Values longer than 12 digits are auto-detected as milliseconds (JavaScript's default).

Convert between Unix timestamps (seconds or ms) and ISO 8601 dates with UTC, local, and relative views.

Unix timestamp (seconds or milliseconds)ISO 8601

Formatted

Unix timestamps count seconds (or milliseconds) since 1970-01-01 UTC.