Sakkyoku.ai provides a browser-based music studio for generating original songs and background music from text, lyrics, themes, or audio uploads. Users can select genres such as pop, jazz, rock, lo-fi, and synthwave, then create vocal or instrumental full tracks. Its lyric generator supports themes, moods, rhyme, song sections, and multiple languages. Uploaded audio can be remixed into another genre while preserving the melody, or expanded with drums, bass, chords, and pads. Users can adjust vocal gender, style, intensity, instruments, and musical direction. Generated projects can include automatic jacket art and can be downloaded as MP3, WAV, MIDI, or stems, depending on the subscription plan. Paid plans include commercial usage rights, while the free plan provides watermarked MP3 files for personal use.