Professional audio DSP
for any browser tab.
Broadcast-quality EQ, multiband dynamics, and ITU-compliant true peak limiting — applied in real time to whatever's playing in your browser. Built for music listeners, podcasters, livestream viewers, and audio engineers.
What is TabDSP?
TabDSP is a browser extension that injects a professional audio plugin chain between any tab and your speakers. Same DSP algorithms found in high-end studio plugins — surgical EQ, transparent dynamics, and broadcast-grade limiting — applied without leaving the browser.
Graphic EQ
8-band parametric with linear-phase mode and real-time spectrum analysis.
Compression
Single-band with sidechain HP and analog or digital character modes.
Multiband Comp
3 or 4-band processing with Linkwitz-Riley 24 dB/oct crossovers.
True Peak Limiter
4x oversampled, ITU-R BS.1770-4 compliant, with 15 streaming presets.
What it looks like
Familiar plugin layouts adapted for the browser — the EQ overlays a high-resolution spectrum, dynamics show real-time gain reduction, and metering follows broadcast standards.
Built like a real audio plugin
Every module is implemented with the same precision you'd expect from a commercial DSP plugin — sample-accurate processing, glitch-free parameter changes, and visual feedback you can trust.
8-band parametric
±18 dB per band, Q from 0.2 to 12, HP/LP filters at 12-48 dB/oct slopes. Minimum-phase, linear-phase, and Mid/Side modes.
Learn more →Spectrum analysis
8192-point FFT with constant-Q power summation (Q=12), 512 log-spaced bins, Blackman window. Native C++ execution, near-zero CPU.
Learn more →Multiband compression
3 or 4-band with Linkwitz-Riley 24 dB/oct crossovers. Independent threshold, ratio, attack, release, and makeup per band.
Learn more →Compressor
Threshold, ratio, soft knee, attack, release, makeup. Sidechain HP filter (20-300 Hz). Digital or Analog character modes.
Learn more →True peak limiting
4x polyphase FIR oversampling. ITU-R BS.1770-4 inter-sample peak detection. 15 streaming and broadcast compliance presets.
Learn more →LUFS & stereo meters
Full ITU-R BS.1770-4 LUFS metering — Momentary, Short-term, Integrated, LRA — plus independent L/R peak and RMS at input and output.
Learn more →Who it's for
TabDSP serves listeners who want better-sounding browser audio and engineers who need precise tools where they work.
Music & podcast listeners
Even out inconsistent loudness across YouTube, Spotify, Bandcamp, and podcast players. Apply EQ presets to compensate for cheap headphones or noisy environments.
Streamers & podcasters
Reference your own content under broadcast-grade processing while editing in browser-based tools. Validate compliance against EBU R128, Apple Music, and Spotify targets.
Audio professionals
Use TabDSP as a monitoring chain over browser playback. Real-time spectrum, LUFS metering, and true peak detection — without leaving the page you're listening to.
How it works
TabDSP injects a Web Audio API processing chain between the page's audio and your speakers. Three steps to get going.
Install
Add the extension from the Firefox AMO listing or the Chrome download. Desktop browsers only.
Pick a tab
Open the popup on any tab playing audio. TabDSP attaches automatically — no per-site setup.
Process
Tweak EQ, dynamics, and limiting in real time. Save presets globally or per-site. Reorder modules with drag-and-drop.
Pricing
Free forever for the core EQ workflow. Upgrade for dynamics, multiband, true peak limiting, and full LUFS metering.
Free
$0
- Full 8-band Graphic EQ (minimum & linear phase)
- Real-time spectrum analyzer
- Mid/Side processing
- RMS metering
- No time limits, no ads
Enthusiast & Professional
From a one-time purchase
- Single-band & multiband compression
- True Peak Limiter with compliance presets
- Full LUFS Stack (M/S/I, LRA, Histogram)
- Module reordering & preset import/export
- All future updates
Browser compatibility
Firefox and Chrome are first-class targets. Each has different platform capabilities for handling DRM-protected content.
Firefox Full
Standard Web Audio interception covers YouTube, SoundCloud, Bandcamp (with CORS opt-in), podcast players, and most music streaming. DRM-protected audio (Spotify premium, Netflix) cannot be processed on Firefox due to browser API limitations.
Chrome Full + tabCapture
Same Web Audio interception as Firefox, plus automatic tabCapture fallback for DRM-protected streams (Spotify, Netflix, Apple Music). Chrome processes the captured tab audio through the same DSP chain via an offscreen document.
Safari & Edge Planned
Both are on the roadmap. Safari requires a separate App Extension build; Edge will inherit the Chrome build but needs validation across the Microsoft Store distribution path. No ETA yet.
Install
Pick your browser. Installation takes under a minute.
Firefox
- Open the Firefox add-ons page below.
- Click "Add to Firefox".
- Open the popup on any tab playing audio.
Chrome
- Download the latest Chrome build from Releases.
- Drop the .zip onto
chrome://extensionswith Developer Mode on. - Pin TabDSP to the toolbar and open any tab with audio.
Self-host
- Browse the full release archive on the Downloads page.
- Pick a signed .xpi (Firefox) or unpacked .zip (Chrome).
- Verify against the changelog and install manually.
Try it on whatever you're listening to right now.
Install in under a minute. Free tier covers the EQ workflow forever.