SoundBound keeps every sound on your device within the decibel range you choose. Loud parts come down. Quiet parts come up. You stop reaching for the volume knob.
Start listening free →Streaming at a comfortable level, then an ad blows your eardrums out. Every single time.
Movie dialogue at volume 30. Explosion at volume 30. One of these is a problem.
Every song mastered differently. Skip a track, grab the volume. Skip again, grab again.
Headphones on, volume low for the house. Half the content becomes inaudible.
One click. Real-time normalization.
Click "Start Listening" and choose any browser tab — YouTube, Spotify, a podcast, anything.
Choose your floor (boost quiet parts) and ceiling (tame loud parts). Watch the live meters respond instantly.
Audio plays through this tab, normalized in real time. Every sound stays inside your range. No clipping, no distortion, no manual adjustments.
The real-time tab normalizer uses the browser's tab capture API, which is only available on desktop Chrome and Edge. Got a file you want to normalize instead? The file upload tool works everywhere — any browser, any device.
You found a comfortable volume for the video. An unskippable ad fires at triple the level. SoundBound caps it before it reaches your ears.
Interview guests with wildly different mic setups. SoundBound floors the quiet voice up and ceilings the loud one down — no fiddling between episodes.
Crank volume to hear quiet footsteps, then get blasted by a grenade. Set a ceiling once. Ambient audio comes up; gunfire stays in check.
Broadcast ads are legally allowed to be louder than programming. SoundBound doesn't care about legal — it just enforces your range.
SoundBound is a real-time audio normalizer for your browser. You set a decibel floor and ceiling, and every sound that plays through your browser is dynamically adjusted to stay within that range. Loud parts get tamed, quiet parts get boosted — no manual volume adjustments needed.
SoundBound uses the Web Audio API to process all browser audio in real time. When a sound exceeds your chosen ceiling, it gets compressed down. When a sound falls below your chosen floor, it gets amplified. The processing happens live in your browser tab — no audio is uploaded or stored.
SoundBound supports dB ranges from -60dB (very quiet) to 0dB (maximum, the loudest possible digital signal). Most users set a ceiling between -6dB and -18dB and a floor between -30dB and -50dB. The exact range depends on your listening environment and preference.
The real-time tab normalizer is available on desktop Chrome and Edge, which both support the Tab Capture API required for live audio processing. On mobile browsers and other browsers, SoundBound supports audio file upload — drop in an MP3, WAV, FLAC, or OGG and get a normalized version back.
Yes. The first 100 users get a free trial with no account required. After the trial, access is available as a one-time $9.99 purchase. No subscription required.
Spotify and YouTube only normalize audio from their own platform. SoundBound normalizes audio from every source simultaneously — streaming video, podcasts, music players, ads, and more — all within one consistent dB range you define. It works at the browser level, not per-app. SoundBound works for every browser tab; for podcast creators, see how to fix podcast LUFS for Spotify and Apple Podcasts.
The loudness penalty is the volume loss your podcast suffers when a streaming platform's normalizer turns down an over-compressed episode to hit its target LUFS. It happens because limiters and compressors that crush dynamic range create audio the platform's loudness meter reads as already being 'too loud', so the final playback is quieter than the source. Avoid it by mastering to the platform's LUFS target (Spotify voice -1 LUFS, Apple Podcasts -16 LUFS) with a brick-wall limiter at -1 dBTP. See our full guide on the loudness penalty in podcasts.
SoundBound is the promise that audio will never surprise you again. Set the terms once. Every sound respects them.
Get notified when SoundBound launches on desktop — new features, platform updates, early access.