Audio FX

Slowed + reverb, nightcore, lofi, 8D audio, karaoke and EQ for any audio in any browser tab.

Apply real-time audio effects to any video or song playing in your browser. ONE-CLICK PRESETS Slowed + Reverb · Nightcore · Daycore and many more! EVERYTHING YOU CAN TWEAK • Speed / tempo (0.5× – 2×) • Pitch tuning (432, 440, 444, 528 Hz) • 3-band parametric EQ (bass, mid, treble) • Reverb with dry/wet mix • Volume boost up to 300% (with built-in soft limiter) • Vinyl-style or pitch-locked slowdown • 8D Audio — auto-panning spatial rotation • Karaoke / vocal cut UNLOCKED FEATURES: • Per-site profiles — different settings auto-applied per website • Precision sliders — 10× finer steps for fine-tuning • Cloud sync — your settings on every Chrome install • Custom reverb upload — drop in any .wav or .mp3 impulse response • Save your own presets • Preset share codes — export and import settings as a portable string • 18+ extra presets • True pitch lock — keep voice pitch when slowing • 8D Audio + Karaoke effects • Export processed audio as .webm PRIVACY Audio FX processes everything locally on your device. No audio is uploaded, recorded, or stored anywhere unless you explicitly use the Export feature (which downloads directly to your machine). Full privacy policy: TIPS • Default keyboard shortcut: Alt+A opens the popup • Hover the ♪ logo to see your installed version • On Spotify: click the popup badge → "Enable tab capture" once per tab