Loudness leveling
A gentle loudness rider brings program audio toward a consistent target.
Calm, automatic listening
Every video. Every stream. One comfortable volume.
Stop adjusting the volume.
Free needs no account. Your audio stays on your device.
A steadier signal
The moment gets loud.
Your listening doesn’t.
Live loudness Protecting comfortably
InputWhat arrives
Sudden Volume Protection
OutputWhat you hear
Made for real watching
Less reaching for the volume.
Sudden Volume Protection
A fast detector pulls abrupt bursts down, then recovers gently.
Dialogue clarity
Optional presence shaping is tuned to keep speech more intelligible.
A/B + Fair Compare
Compare processed audio with the original at matched loudness.
Presets & site profiles
Choose Balanced, Dialogue, Movie, Night, or Music—and set profiles you control.
Private by design
Audio is processed in-browser. It never leaves your device.
Your audio never leaves your device. No uploads, no audio samples, no browsing history sent away.
Read the privacy promiseChoose your browser
Install where you watch.
Store links go live after review. Release ZIPs are available when published.
Simple by design
Start free. Keep control.
Free needs no account.
Questions, answered
Good to know.
Does it change my system volume?
No. Compressr processes eligible browser audio; it does not change your system volume.
Does my audio leave my device?
No. Audio processing happens inside your browser, on your device. Audio is never uploaded.
Do I need an account to use Free?
No. The Free tier works without an account.
What does Compatibility Mode mean?
On Firefox and Safari, Compressr works with discoverable HTML5 media that is same-origin, MSE, or CORS-loaded. DRM and WebAudio-native players play at their original volume.
Can I compare the original sound?
Yes. A/B lets you compare processing on and off, while Fair Compare matches loudness so you can judge the tone.