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 Add-ons store or the Chrome Web Store. 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 TabDSP listing on Firefox Add-ons.
- Click "Add to Firefox".
- Open the popup on any tab playing audio.
Chrome
- Open the TabDSP listing on the Chrome Web Store.
- Click "Add to Chrome".
- Pin TabDSP to the toolbar and open any tab with audio.
Older versions
- Browse the release archive for previous signed builds.
- Useful for rollback or checking changelog history.
- Current releases install from the stores above.
Try it on whatever you're listening to right now.
Install in under a minute. Free tier covers the EQ workflow forever.