Regex Editor & Tester

This regex matches ISO 8601 duration format, which represents time intervals like P1Y2M3DT4H5M6S (1 year, 2 months, 3 days, 4 hours, 5 minutes, 6 seconds). It validates the complete duration syntax including optional decimal values using either comma or period as decimal separator. Useful for scheduling applications, time tracking systems, or any context that needs to parse standardized time interval representations.