A closer look at sound

Sound Spectrogram

100% on your device

See the detail you can hear. Explore every harmonic, transient and texture in a precise, interactive frequency view.

Drop a sound file here

MP3, WAV, FLAC, M4A, OGG, AIFF, AAC, WMA, OPUS and more. Audio never leaves your device.

Open a recording to begin, or try the demo. No account or upload needed.

Your audio, in detail

Ready for a recording

Settings

Default view

View

Spectrogram display

Window size Window type Zero padding factor

Larger windows separate closer frequencies. Zero padding refines the frequency grid.

Audio channel Frequency scale

Frequency range (display only)

Min frequency (Hz) Max frequency (Hz) Max follows Nyquist

Nyquist is half the audio sample rate. Display limits do not filter the audio.

Amplitude range (waveform)

Auto (fit each channel) Min amplitude Max amplitude

Spectrogram appearance

Palette Auto brightness Gain (dB) +20 dB Range (dB) 100 dB Display height Show frequency grid

Settings are remembered on this device. Your audio is not saved.

Live spectral mask

Listen toAttenuation 72 dBPreview detail

Time from (s)Time to (s)Low frequency (Hz)High frequency (Hz)

Add regions Loop selection Compare original

No masks yet. Choose Mask tool and drag a rectangle over the spectrogram.

Mask changes update what you hear during playback. Audio stays on this device.

Drag a rectangle to select time and frequency. Move it or drag its corner handles. Shift-drag adds a region. Drag on the waveform for a time-only mask. Masks affect all playback channels, with gentle edges to reduce clicks.

A whole new way to listen

Choose a sound file or load the demo
to reveal its frequency fingerprint.

Time —Frequency —Level —Quiet Loud −100 to 0 dBFS

RECORDING OVERVIEW Drag to navigate

0:00.000 / 0:00.000Volume

Set an exact time range

Start (seconds)End (seconds)

Zoom tool: drag to zoom, Shift + drag to pan · Mask tool: drag to select audio · Scroll to zoom · Click to seek

Find the fine detail

Zoom into time and frequency to inspect harmonics and short events. Each zoom is calculated again from the audio. Increase the FFT size to separate close frequencies; use a smaller size to sharpen timing.

Read the colors

Time runs left to right, frequency runs bottom to top, and brighter colors mean stronger sound. Increase brightness to reveal quiet sounds. The readout shows peak windowed amplitude in dBFS.

Your recording stays yours

Files are decoded and analyzed inside this browser. For less common formats, a decoder downloads from this site and runs locally. Encrypted, damaged or unsupported files cannot be opened. Large recordings depend on device memory (512 MB file limit).