Louder
A volume knob for every browser tab, up to 600%, kept clean by a look-ahead limiter.
About
Better sound shouldn't need a studio.
SoundBooster is a free set of audio tools built on one idea: the browser you already use is powerful enough to make sound noticeably better — louder, clearer and ready to share.
600%
maximum boost, without distortion
25+
free audio tools
6
mastering engineers
0
sign-ups or payments needed
Why we built it
It started with a video that was too quiet.
Everyone knows the feeling: the volume is already at 100% and a video, a call or a song is still too quiet. The usual fixes either don't exist in the browser or make everything crackle. So we built a volume booster that stays clean — one tab at a time.
The same problem kept showing up for musicians. Making a song sound finished meant expensive plug-ins, confusing meters or mastering services that hand back a file with no way to say what you actually wanted. So we built mastering you can describe in your own words, and the tools around it: stems, a studio, meters, converters and visuals.
We made all of it free, because better sound shouldn't depend on a subscription.
Better
Mastering you can describe in plain words, with six engineers and fair, loudness-matched comparisons.
Finished
Stems, a studio, music videos, visuals and the everyday tools that take a song all the way to release.
How we build
Four promises.
On your device first
If audio can be processed in your browser, it is. Files only travel when a feature truly needs a server — and the page says so first.
Honest by default
Every control does something you can hear. When a feature depends on a service that isn't connected, we tell you instead of faking a result.
Measured, not guessed
Loudness follows ITU-R BS.1770 and EBU R128, peaks are true-peak oversampled, and A/B comparisons are loudness-matched.
Free for everyone
No plans, no trials, no credit card. Good sound shouldn't depend on a subscription.
What's next
We're just getting started.
We're working on more tools, a SoundBooster app you can install on your phone, and ways to take your projects between devices. Tell us what you'd like us to build — we read everything.