Skip to content
DDevToolery

Duration Formatter

Turn a raw number of seconds into readable and ISO 8601 durations.

Loading tool…

About this tool

Turns a raw number of seconds into readable forms — human phrasing, clock notation, and the ISO 8601 duration format used in APIs and schedule definitions.

Questions

What does P1DT2H3M4S mean?
ISO 8601 duration: one day, two hours, three minutes, four seconds. The T separates date components from time components.

Privacy

This page does its work in your browser. What you paste is processed by JavaScript running on your own device and is never sent to a DevToolery server — there is no server that could receive it. The page itself is a static file delivered by a CDN. See exactly what is stored.