JSK SoundShape — Equalizer & Volume Booster

Shape the sound of any tab. JSK SoundShape is a 10-band equalizer, volume booster and per-site audio profile manager — and the only equalizer extension that tells you, in plain English, when a tab's audio cannot be processed.

THE FULL EQUALIZER IS FREE No account, no sign-up, no trial period. Ten bands, six presets, a 300% volume booster and per-site memory all work the moment you install it.

WHAT YOU GET • 10-band equalizer — 32 Hz to 16 kHz, plus or minus 12 dB per band, adjusted live with no clicks or pops • Volume booster to 300% — a limiter sits permanently in the chain, so a boosted tab gets louder rather than distorted • Bass boost, mono and left/right balance • Per-site audio profiles — YouTube remembers one curve, your podcast another. They apply themselves; there is nothing to switch • Per-tab overrides — one YouTube tab a lecture, the next one music • Live spectrum — see the frequencies you are shaping • Hold to compare — a true A/B against the untouched audio, because your ears adapt within a minute • Export your settings at any time, with no account

IT TELLS YOU WHEN IT CANNOT WORK Some sites deliver audio under DRM, which is encrypted end to end. No browser extension can process it — not this one and not any other. Most equalizer extensions go quiet and leave you wondering. SoundShape names the reason: protected audio, a muted tab, a browser settings page, or another extension already holding the tab. Every message carries the browser's own error text for support.

FREE WITH A JSKAPPS ACCOUNT A named preset library, the saved-sites manager, import and restore, migration from EqualizerAPO and AutoEQ profile files, two curated preset packs, three accent themes and three visualizer modes.

PRO Loudness levelling so quiet dialogue and loud adverts sit at one steady level. A parametric EQ with eight editable slots. Headphone correction from an AutoEQ profile for your exact model. Night mode, crossfeed and stereo width. Advanced site rules with wildcards and time windows. 14-day free trial, no card required.

PRIVACY No host permissions on Chrome or Edge — the extension cannot read the pages you visit. No analytics, no trackers, no advertising. Audio never leaves your device. On the free tier the extension makes no network requests at all; connect an account and the only thing it sends is a licence check.