Big Volume Booster — Sound Amplifier & Audio Booster

Make any tab louder — instantly.

Volume booster — boost any tab up to 600%. Free sound amplifier & audio booster; louder video & music, per-tab control.

What you get:
• Boost volume well beyond the system maximum on any tab
• Live slider — hear the change as you drag, no reload
• Per-site memory: your boost is restored next time you visit
• Works on video and audio elements, including SPA players

How it works:
Click the toolbar icon and drag the slider. The boost applies to the current tab’s audio in real time using the browser’s Web Audio engine — nothing is uploaded.

Free to try, then $9.67/mo:
Use it free up to 10 times. After that, unlock unlimited use for $9.67/mo — cancel anytime from the checkout’s billing portal.

Privacy:
This extension boosts the audio playback volume of the browser tab the user is on. It runs in your browser; we do not collect or transmit the content you work with. Subscription status is stored locally and verified through our secure checkout.

Permissions (and why):
• activeTab — Operate on the current tab only, and only when the user clicks the extension.
• storage — Persist the user’s free-usage count and subscription status locally — no server account needed.
• tabs — Detect when the user returns to the payment-success page after checkout so the Pro features can be unlocked.
• scripting — Inject the feature into the page the user is viewing at the moment they invoke the extension.

Get started:
Click the toolbar icon and try it now.