It is the number of seconds elapsed since midnight UTC on 1 January 1970, a compact way computers store dates and times.

Many languages use milliseconds rather than seconds. Divide by 1000 to get the standard Unix timestamp.

Yes. Timestamp Converter is completely free with no sign-up, no watermarks and no usage limits.

No. Timestamp Converter runs entirely in your browser, so your data never leaves your device.

Only your device's available memory — there are no server-side limits because nothing is uploaded.