Question 1

How do I convert seconds to a human-readable duration?

Accepted Answer

Enter the number of seconds into the Seconds field and the tool instantly shows the result in formats like '1h 5m 30s', '01:05:30', full words ('1 hour 5 minutes 30 seconds'), and ISO 8601 ('PT1H5M30S'). You can also enter milliseconds or an HH:MM:SS string.

Question 2

What input formats does the Duration Formatter accept?

Accepted Answer

The tool accepts a plain number of seconds (e.g. 3930), milliseconds (e.g. 3930000 when ms mode is selected), or an HH:MM:SS / MM:SS timestamp string like '01:05:30' or '5:30'. The input mode dropdown controls whether a bare number is treated as seconds or milliseconds.

Question 3

Is my data sent to a server?

Accepted Answer

No. All conversion happens entirely in your browser using JavaScript. No timing data, logs, or inputs are ever transmitted to any server.

Question 4

What output styles are available?

Accepted Answer

Five styles: compact ('1h 5m 30s'), clock ('01:05:30'), full words ('1 hour 5 minutes 30 seconds'), ISO 8601 duration ('PT1H5M30S'), and a breakdown table showing days, hours, minutes, seconds and milliseconds. Each result has its own copy button.