Your files are read directly in this browser tab and never leave your computer.
On iPhone/iPad, if the folder picker won't let you select a folder you've navigated into, use "Select Files" and choose the recordings directly instead — this is a known iOS quirk with folder pickers in general, not specific to this tool.
This opens files for editing rather than just viewing. Saving a change writes it directly back to the original file on your disk — there is no undo, and no automatic backup is made. Available in Chromium-based browsers only (Chrome, Edge, Opera, Arc); Firefox and Safari, including iPhone/iPad, cannot write to local files from a webpage at all.
Your browser blocked the folder-write permission because this page was opened straight from disk
(a file:// address), where writing to local files isn't allowed. Reading, playback and
export all still work. To edit metadata, serve this folder over http instead: run
python3 -m http.server in the folder holding this file, then open
http://localhost:8000/.
This mix is for listening only. Exports and reports ignore it.