UD5 Toolkit
Cross‑Origin Isolation Checker - Online COOP/COEP Test
Check if your site is cross‑origin isolated by examining the COOP and COEP headers. See if SharedArrayBuffer is available.
Tag: Extract Vocals from Music
3+ toolsisolation CSS Property Demo - Online Control Stacking Context
Use isolation: isolate to contain mix‑blend‑mode and filters. See the visual difference with and without. Quick demo.
Sound Wave Extractor - Online Isolate Vocals or Instrumental
Simple phase cancellation tool: load a stereo track and attempt to remove center‑panned vocals. Not perfect, but fun to experiment.