SoundBound
Home Profiles
Real-Time Normalizer
Capture any browser tab and keep audio in your target range — live, zero latency.
One-time $2 — yours forever
  • ✓ Live tab audio capture + normalization
  • ✓ Real-time dB floor & ceiling control
  • ✓ Works with YouTube, Spotify, podcasts
  • ✓ No account or subscription needed
Unlock for $2
Secure checkout via Stripe · Instant unlock

Tab audio capture requires desktop Chrome or desktop Edge.

Firefox and Safari don't support capturing audio from browser tabs yet.

Live audio capture requires a desktop computer.

Mobile browsers (including Chrome and Edge) don't support tab audio capture.
Use the File Upload tab instead to normalize audio on your phone.

Normalize audio in real time

Capture audio from any browser tab and listen through SoundBound. YouTube, Spotify, podcasts — everything stays within your dB range.

You'll pick a browser tab to capture.
Audio plays through this tab, normalized in real time.

Normalizing tab audio
Input (raw from tab) —
floor
ceiling
Output (normalized) —
floor
ceiling
-60-50-40-30-20-100 dB
Gain reduction
0 dB
📉 Floor -40 dB
-60-40-20-6
📈 Ceiling -6 dB
-40-20-60
Active profile Manage

Normalize your audio file

Upload a file, set your dB range, get perfectly leveled sound.

🎵

Drop an audio file here

or click to browse · MP3, WAV, OGG, FLAC, AAC · Max 50MB

Normalization range

—
Peak
—
Avg RMS
—
Duration
—
Format
📉 Floor (quiet parts boosted to) -40 dB
-60 dB-40 dB-20 dB-6 dB
📈 Ceiling (loud parts compressed to) -6 dB
-40 dB-20 dB-6 dB0 dB
Processing...

Result

Normalized
Original
—
peak dB
—
avg RMS
→
Normalized
—
peak dB
—
avg RMS
Original
Normalized
Original
Normalized

Frequently asked questions

What is SoundBound?+

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.

How does volume normalization work?+

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.

What decibel range can I set?+

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.

Which browsers and devices are supported?+

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.

Is SoundBound free to try?+

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.

How is SoundBound different from Spotify or YouTube's built-in loudness normalization?+

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.