5 free browser tools

Free SongRemixer tools

Free, no-account tools that run entirely in your browser. Nothing is uploaded — your audio never leaves your device.

Click a key, see everything that mixes with it — the harmonic mixing chart, live.

From-BPM to to-BPM: pitch drift, stretch percentage, and the halftime path.

Change pitch and tempo independently — remix prep, rendered in your browser.

Drop two songs — get keys, tempos, and an honest verdict on the blend.

Two decks, tempo faders, crossfader — practice transitions in the browser.