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Free on Chrome & Edge

Audio control for every tab.Finally clean.

Volume boost up to 600%, a 10-band EQ, Smart Mute, and per-site memory — built without the tracking that plagued the category.

Available on Chrome Web Store · Microsoft Edge

Add to Chrome — free Hear it live

Per-site memory

YouTube remembers Bass Boost. Spotify remembers Flat. Teams stays untouched.

Most audio extensions apply one global setting to everything. SuperchargeAudio tracks volume and EQ independently for each site — saved the moment you change them. Switch tabs and the right profile loads automatically. No manual presets to pick each time, no settings that bleed across services.

  • Volume level stored per origin — YouTube at 130%, Spotify at 85%, Discord at 100%
  • EQ curve saved per site — apply Bass Boost to music, Vocal/Voice to podcasts
  • Global default curve applies automatically to any site without a saved override
  • youtube.com Bass Boost 130%
  • open.spotify.com Flat 85%
  • podcasts.apple.com Vocal/Voice 110%
  • meet.google.com Vocal/Voice 100%
  • Max boost 600% distortion-managed
  • EQ bands 10 32 Hz – 16 kHz
  • Presets 11 one-click tone shaping
  • Data collected Zero no servers, no tracking

Hear it live

Make a quiet voice easy to follow.

Drag the slider past 100% to boost a quiet voice recording, with no sound at all until you press Play.

Voice sample
A short voice sample you can play.
tideline.test Sharing this tab
Extensions
SuperchargeAudio
SuperchargeCapture
SuperchargeNavigation
SuperchargePerformance
Manage extensions

SuperchargeAudio

T
tideline.test
Silenced Normal · nothing saved here Boosted · saved for this site Volume kept at 251 % Tabs play normally · 251 % returns on Resume Not boosted yet Protected boost saved for this site
100%
Normal · 0.0 dB
0 100% 300 600
Silence is on
All 3 tabs are muted, this one too.
Protected audio
This site encrypts its audio, so the normal boost can't reach it. Protected boost records this tab's sound on your computer and plays it back louder.
Paused · tabs play normally
Nothing is processed. Tabs play at their normal volume.

This sample starts quiet, so keep your volume where you normally have it.

What the sample says

And a lot of global institutions visited Japan in those days and took away a series of tools and techniques that they thought were the things that drove change. These are things like quality management and just-in-time production.

The demo caps its own output, so even 600% stays moderate at your usual volume.

If there is no sound, check your ringer switch.

Everything your tabs were missing.

One lightweight extension for volume, tone, space, and silence — all stored per site.

Core

  • Volume Boost up to 600%

    Gain scales from 0× to 6× (0–600%) via the Web Audio API GainNode. Distortion management keeps loud signals listenable. Each site remembers its own level automatically.

  • 10-Band EQ

    32 Hz to 16 kHz, ±12 dB per band. Eleven presets ship out of the box: Flat, Bass Boost, Vocal/Voice, Treble, Loudness, Rock, Pop, Electronic, Acoustic, Classical, and Small Speakers. Set a global default or override per site.

  • Smart Mute

    Auto-mutes background tabs when you switch away; unmutes on focus. Silent mode, exclude-pinned option, and per-site Always allow and Always mute lists give you full control over what gets silenced.

Space

  • Stereo width

    Adjust stereo width from 0% (mono) to 200% (ultra-wide). Collapses to mono for single-earbud listening; expands for music that benefits from a wider image.

  • Fix one ear

    Merges both channels into mono. Useful for uneven hearing, a single earbud, or recordings with unbalanced stereo — keeps everything audible in both ears.

  • 8D Audio

    Rotates the stereo image on a ∼12.5-second cycle using ITD (inter-aural time delay, 0–6 ms) and anti-phase processing. Creates a spatial effect designed for headphone listening.

  • Headphones

    Crossfeed mixes a fraction of each channel into the other, simulating how speakers interact in a room. Reduces ear fatigue on hard-panned recordings — particularly noticeable on older rock and classical recordings.

Control

  • Smart Mute

    Auto-mutes background tabs when you switch away; unmutes on focus. Silent mode, exclude-pinned option, and per-site Always allow and Always mute lists give you full control over what gets silenced.

  • All playing

    See every tab currently making sound in one list. Switch to any of them, mute individually, or drag a per-tab volume slider without leaving your current tab.

  • Protected boost

    Opt-in “Turn on Protected boost” per tab brings boost and EQ to DRM-protected sites like some streaming services. Off by default, per tab only.

Smart Mute

One tab plays. The rest stay silent.

Open twenty tabs and only the one you're looking at makes sound. Switch away and it mutes; switch back and it returns. The All playing panel shows everything making noise — switch, mute, or set a level without leaving your page.

  • 600% Max volume boost
  • 200% Stereo width range
  • Zero webRequest access

Provably clean

Built to touch audio and nothing else — permissions you can verify.

In January 2026, a 20-million-user volume booster was caught injecting affiliate popups and running tracking via webRequest. Several others in the category had undisclosed C2 connections.

SuperchargeAudio was built from the start with a different constraint: touch audio, nothing else. The permission set reflects that. Storage, tabs, tabCapture, and offscreen — no webRequest. The extension cannot intercept or modify network traffic. Full stop.

  • No webRequest permission — cannot intercept or rewrite network requests
  • tabCapture used only for opt-in Protected boost, never for surveillance
  • Zero telemetry, no analytics, no account required
  • All audio processing runs locally via the Web Audio API
  • Source is auditable — permissions match exactly what the code does

Frequently asked questions

Does SuperchargeAudio work on Microsoft Edge?
Yes. Edge is Chromium-based and supports the same Web Audio API and extension APIs. SuperchargeAudio is live on both the Chrome Web Store and the Microsoft Edge Add-ons store — same features, same permissions, same codebase.
What permissions does it request, and why?
Four permissions: storage (saves your per-site settings locally), tabs (detects which tab is active for Smart Mute), tabCapture (opt-in Protected boost for DRM-protected sites like some streaming services), and offscreen (runs the audio processing document for captured tabs). There is no webRequest permission. The extension cannot read, intercept, or modify network traffic of any kind. The extension also requests access to the audio on pages you visit — that site-access permission is the only way to adjust a page’s sound, and it is used for nothing else.
Is it free?
Yes. SuperchargeAudio launches free, with no account required. All core features — volume boost, EQ, Smart Mute, per-site memory, stereo tools — are included. The plan is to keep the core free permanently.
Does it work on YouTube and Spotify?
Yes on both, with a note on Spotify: because Spotify Web uses DRM-protected audio, it requires the opt-in “Turn on Protected boost” per tab (tabCapture). YouTube, Twitch, Discord, Google Meet, and Microsoft Teams all work without any extra steps. Locally hosted audio and most other sites work out of the box.
What does 8D audio actually do, and does it help?
8D audio rotates the stereo image using inter-aural time delay (ITD) — a 0–6 ms phase shift between channels on a ∼12.5-second cycle. It creates the impression of sound moving around your head. Some people find it engaging for music; others find it distracting. It is designed for headphone use. For single-earbud listeners, Fix one ear (mono merge) is more practical.
What is per-site memory and why does it matter?
Per-site memory means SuperchargeAudio stores your volume level and EQ curve separately for each website. YouTube at 130% volume with Bass Boost, Spotify at 85% with Flat, Teams at 100% with the Vocal/Voice preset — all saved automatically the moment you change them. Switch between tabs and the right profile loads without any manual switching. As of May 26, this works across Chrome sessions too.

Verified Publisher, Featured on the Chrome Web Store

Three seconds to install.

Free on the Chrome Web Store and Microsoft Edge Add-ons. No account, no telemetry — just better sound in every tab.

Free · 4.6 on the Chrome Web Store · 13,000+ weekly users · No account

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From the same team

Great sound, no fan noise.

Idle tabs get suspended to free 90–95% of their RAM, and your playing tab is never touched mid-track.

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