Regex Tester & Validator

Matches media timestamps in a flexible format with optional hours and minutes plus an optional decimal fraction, e.g. '1:23:45.678', '23:45.5', or plain seconds like '42'. Hours, minutes, seconds, and fractional (millisecond) parts are captured into separate groups for easy extraction. With global and multiline flags, it's ideal for scanning subtitle files, playback logs, or video/audio duration strings for all timestamps.