Cans

Audio Boost, Pan & EQ for any tab

A Chrome extension that processes the active tab's audio in real time — push the volume past 100 %, pan the stereo image, swap left and right channels, and shape the sound with a 10-band EQ.

Available on the Chrome Web Store

What it does

Volume boost — 0 to 500 %, well past Chrome's built-in ceiling. For quiet recordings, under-mixed podcasts and laptop speakers that just won't reach.
Stereo pan & channel swap — move the audio between your ears, or send the left channel to your right ear with one tap. Useful for guitar practice with backing tracks, dead earbuds, or films that mix dialogue to the wrong side.
10-band equalizer — 31 Hz to 16 kHz, ±12 dB per band, with a preamp and eight built-in presets (Flat, Rock, Pop, Jazz, Classical, Bass, Treble, Vocal).
Independent left/right EQ — unlock the EQ to get two independent chains with their own tabs and presets. Handy if your hearing isn't symmetric.
Profiles — save full snapshots of every control and roam them across your devices via Chrome sync.

Screenshots

The EQ in Stereo mode with the L tab active, showing two independent per-channel curves — Stereo EQ mode: lock icon unlatched, L/R tab switcher revealed, each channel has its own 10-band curve.

Privacy

Cans does not transmit any data outside the browser. No analytics, no telemetry, no third-party scripts. The audio stream is processed in real time inside the offscreen document — never recorded, never sent over the network. Per-tab settings live in chrome.storage.session (wiped on browser restart); named profiles live in chrome.storage.sync so they roam with your Chrome account. Uninstalling the extension deletes all of it.

Get it

Cans is live on the Chrome Web Store — install it from here. If you want to talk audio extensions or share feedback, the contact details are on the home page.