Free audio visualizer that reacts to any sound source
An audio visualizer for files, live microphone input and browser-tab audio. Free, local-only, exportable. Built for people who need real reactivity, not a stock loop.
Who this is for
- Podcasters making audiograms
- Streamers who want reactive overlays for OBS
- Sound designers checking transients and spectrum
Three ways in: file, microphone, tab
Load a file for a clean analysis with a whole-track beat map. Use the microphone for a live room or an instrument. Or share a browser tab so YouTube, Spotify web, SoundCloud or a call becomes the source — the audio keeps playing while BLOOB reacts to it.
Scenes built on the spectrum
Scenes like Pulse Lanes, Signal Ridges and Mirror EQ are literal instruments: a 96-band log spectrum, peak holds, a scrolling spectrogram, an oscilloscope and a vectorscope. Others (Nebula, Liquid BLOOB, Resonance Plate) turn the same data into physics and light.
Tuned per machine, not per operating system
BLOOB measures your real frame rate, output latency and noise floor and adapts: a Windows laptop on integrated graphics gets the same clean, anti-aliased picture as a Retina Mac, and the beat lead compensates for Bluetooth headphones automatically.
How to do it
- Open BLOOB — nothing to install, no account
- Choose a song, or use your microphone or a browser tab
- Pick a scene, a mood and a palette
- Press Record (or Export MP4) and download your video
Questions people ask about free audio visualizer
Can I use my microphone?
Yes. Click Mic Input. Nothing is recorded or sent anywhere — the stream is analysed live in the browser.
Can it visualise Spotify or YouTube?
Play the song in another tab and use “Visualize a Tab” with “Share tab audio”. Works in Chrome and Edge on desktop.
Does it work on a phone?
Yes. The interface becomes a bottom sheet on phones, and both file and microphone input work in Safari and Chrome.
Is there a Windows or Mac app?
It is a web app, so it works on both. A desktop wrapper exists for Mac; the browser version is the source of truth.
Related: music visualizer online · spectrum analyzer online · oscilloscope music visualizer · music visualizer for obs