Free tool
Runs entirely in your browser. Load an audio file or open your microphone and watch the frequencies move in real time — great for checking mixes, voices, and the shape of a sound. Nothing is uploaded.
Try it
The fastest way to visualize a frequency spectrum without installing anything.
MP3, WAV, OGG, M4A — up to 25 MB. We'll chart its frequencies live as it plays.
How it works
The analyzer uses your browser's Web Audio API to decode the audio (or tap your microphone), run a real-time frequency analysis, and paint the spectrum — all on your machine, no server round trip.
Step 1
Upload an MP3, WAV, OGG or M4A — up to 25 MB — or use your mic.
Step 2
We analyse the signal frame by frame as it plays, in your browser.
Step 3
Bars rise with energy: bass on the left, treble on the right.
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