Tab Eq — Parametric Equal

Tab EQ turns any tab into a studio-grade parametric equalizer.

Unlike the fixed 10-slider equalizers in most extensions, Tab EQ gives you a real, draggable frequency-response curve - the same interaction pro audio tools use. Grab a point, move it in frequency and gain, scroll to change its width, and hear the change instantly.

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Why people love it:
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- True parametric curve editor - drag nodes, double-click to add/remove bands, scroll for Q, or type exact values. Peak, shelf, high/low-pass and notch filters.
- Live spectrum analyzer behind the curve - EQ what you actually see.
- Volume boost to 600% for quiet tabs, with a built-in limiter + auto-preamp so loud boosts never distort. (Distortion is the #1 complaint about other boosters - Tab EQ fixes that.)
- Per-tab - every tab gets its own independent EQ.
- Per-site & per-YouTube-channel memory - save an EQ for a whole domain, or for a specific YouTube channel, and it auto-applies next time - even as you switch between videos on that channel. Plus genre presets and your own saved presets.
- Full theming - built-in Light, Dark and colored presets, or customize every color by hex value and save your own theme. The whole interface, including the graph and knobs, recolors live.
- Instant Bypass - compare your EQ against the original audio with one click, no dropout.
- Flatten - back to neutral in one click.
- Keyboard shortcuts, a full-screen editor, and one-click enable (it turns on when you open it on a tab).

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Private by design:
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- Requests the absolute minimum permissions - no browsing history, no host permissions, no standing access to any site. (On YouTube it reads only the current channel name, locally, to remember your per-channel EQ.)
- 100% local - audio and theming are processed in your browser. No network requests, no accounts, no analytics, no ads.
- Works in Chrome, Brave, Edge and other Chromium browsers.

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About the "read and change all your data" permission
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Chrome shows this warning for any extension that uses the tab-audio-capture API - it is not something we can turn off. But here is exactly what Tab EQ can and cannot do:

- ✅ It receives the audio of a tab only after you click "Enable EQ" on that tab.
- ❌ It cannot read the page's text, forms, passwords, cookies, or history.
- ❌ It requests no website host permissions and adds no background page access.
- ℹ️ On YouTube it reads the channel name of the active tab (via `activeTab`+`scripting`, no warning, no network) so it can remember your EQ per channel - nothing else on the page is used or stored.

We deliberately chose tab capture over the "content script" approach that some equalizers use. Content scripts show a friendlier install prompt but actually get full read/write access to every page and break on many sites. Tab capture is the genuinely more private and more reliable design.