How do I analyze the frequencies in an audio file?

Pick 'Upload file', drop an MP3, WAV, OGG or M4A, then press Play. The tool draws a live frequency view as the clip plays — all in your browser, no account needed.

Can I see my microphone's spectrum in real time?

Yes. Switch to 'Microphone' and allow access. Your mic is analysed live and rendered as moving frequency bars — it is never recorded, saved, or uploaded.

Does my audio get uploaded?

No. Decoding and analysis run entirely in your browser using the Web Audio API — your file and microphone audio never leave your device.

Free tool

See any sound as a live frequency spectrum.

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

Analyze a file or your microphone

The fastest way to visualize a frequency spectrum without installing anything.

Drop an audio file here

MP3, WAV, OGG, M4A — up to 25 MB. We'll chart its frequencies live as it plays.

How it works

Your audio never leaves your device

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

Choose a source

Upload an MP3, WAV, OGG or M4A — up to 25 MB — or use your mic.

Step 2

Press play

We analyse the signal frame by frame as it plays, in your browser.

Step 3

Read the spectrum

Bars rise with energy: bass on the left, treble on the right.

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Related free tools

Keep going — every one of these runs free in your browser, no signup.

BPM / Tempo DetectorFind the tempo of a track in beats per minute.ID3 Tag EditorView and edit MP3 title, artist, album and more.Audio Format ConverterConvert between MP3, WAV, OGG, M4A and FLAC — right in your browser.Video to Audio ExtractorPull the audio track out of an MP4, MOV or WEBM as MP3 or WAV.

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Want the full studio?

Open the AudioPod dashboard for stem separation, voice cloning, transcription, multilingual narration, and batch processing — all on one free account.

Open the dashboard