Setflow

Setflow lays a plan over any YouTube Music playlist. Give the night a shape: split it into phases with their own names, lengths and colours. Open the playlist and every track is marked with the colour of the phase it will play in. Hover a track to read the clock time at any second of it, the phase it lands in, and how far in you are. Playing through sunrise or sunset? Type the times and Setflow shows which track carries the sun up or down, with a countdown as you hover and a marker on the plan. WHAT YOU GET • Phases with names, durations and colours. A track that straddles two phases shows both. • A plan above the tracklist: name, start and end, how much of the plan the music covers, and a strip you can scrub to find the track playing at any minute. • Hover any track for the clock time at that second, the phase, and your position in the track. • Sunrise and sunset markers with countdowns. • Library: journeys are saved per playlist and reopen when you come back. Presets from a quick two hours to a full twelve, plus your own. • Export the set as JSON: every track with its clock time, phase and link. HOW IT WORKS 1. Open a playlist on YouTube Music. 2. Click Setflow. Set a start time, shape the phases or pick a preset, add sunrise and sunset if you need them. 3. Press Start planning. The playlist is marked up in place. PRIVATE BY DESIGN Everything stays in your browser. No account, no server, no analytics. Setflow only runs on music.youtube.com and only reads the playlist page to find the tracks and their lengths. Free and open source under the MIT licence: github.com/kasvith/setflow