Kasette

Kasette is a 100% offline, client-side music player. Import audio files from
your device, and everything else happens locally: no accounts, no servers,
no analytics, no network access at all.

Features:

• Import local audio files (MP3, FLAC, M4A, OGG, Opus, WAV, AAC)
• Client-side ID3/FLAC tag and embedded cover art parsing
• Browse all your songs directly, with optional playlists enabled in Settings
• Background playback with lock-screen/notification controls
• Search across title, artist, and album
• Light and dark themes, with accent color and background options
• English, Spanish (Latin American), Portuguese (Brazil), French, German,
and Simplified Chinese, switchable in Settings
• Export or restore your whole library as a single backup file, to any
folder, an SD card, or a USB drive
• Installable as a Progressive Web App, and available as this native
Android build

There are no accounts, no cloud sync, and nothing ever leaves your device.