Slowed+Reverb & Audio Effects

Slowed+reverb, nightcore, daycore & bass boost - real-time audio effects for YouTube & web audio. Free, private, 0 data.

Tired of searching for slowed+reverb versions of your favorite songs? Create your own: instantly, right in your browser. Slowed+Reverb & Nightcore transforms any audio or video on the web into a slowed+reverb, nightcore, daycore, or bass-boosted remix in real time. No downloads, no rendering, no waiting. HOW IT WORKS Go to YouTube or any website with audio/video content Click the extension icon Choose a preset or customize your sound That's it: hear the effect instantly BUILT-IN PRESETS • Slowed+Reverb: 0.8x speed with atmospheric reverb (the classic vibe) • Nightcore: 1.2x speed for high-energy remixes • Daycore: 0.9x speed with subtle, mellow reverb • Custom: Create and save unlimited personal presets PROFESSIONAL CONTROLS • Speed: 0.5x to 1.5x with precise step control • Reverb: 0% to 100% professional convolution reverb • Bass Boost: Enhance low frequencies up to 10dB (Pro) • Volume: Amplify up to 400% • Pitch Correction: Keep original vocals when slowing down (Pro) WORKS EVERYWHERE YouTube And virtually any website with audio or video content PRIVACY FIRST: ZERO DATA COLLECTION All audio processing happens 100% locally in your browser using the Web Audio API. We collect absolutely no personal data, no browsing history, no audio content. No ads, no trackers, no external network requests. Your listening is private. FREE vs PRO The free version includes Speed, Reverb, Volume, and all built-in presets. Upgrade to Pro for Bass Boost, Pitch Correction, and custom presets via our Patreon. FAQ Q: Does this work with other audio/video websites? A: Yes! The extension works with YouTube and virtually any website that plays audio or video content. Q: Will this change the original audio file? A: No. Effects are applied in real-time and disappear when you turn them off. Nothing is saved or modified. Q: How is this different from downloading a slowed+reverb version? A: You can create YOUR preferred mix of any song instantly: choose your exact speed, reverb amount, and bass level instead of relying on what someone else uploaded. Q: Is my data safe? A: Absolutely. All processing happens locally in your browser. We never collect, store, or transmit any data.