Add Chorus, Phaser, Flanger & Tremolo — Free Online Tool

DRIFT is a browser-based modulation processor with four classic effects: chorus, phaser, flanger, and tremolo. Upload any audio file, enable the effects you want, dial in rate and depth, then preview or export a processed WAV. No sign-ups, no downloads — everything runs locally in your browser.

Chorus creates width by mixing the dry signal with a pitch-modulated copy. Phaser sweeps allpass filters across the frequency spectrum for that classic jet-sweep sound. Flanger uses short modulated delays with feedback for metallic, swooshing textures. Tremolo modulates volume at an adjustable rate — use sine for smooth undulation or square for rhythmic gating.

Chain multiple effects together and blend with the wet/dry mix knob. Preview in real-time to fine-tune settings before exporting.