Free Online Spectrogram Viewer

See the full spectrogram of your audio file, zoom into any section, and export a PNG image. Compare left/right and mid/side channels directly in your browser.

Free · No sign-up · Your audio stays on your device

Drop an audio file to generate its spectrogram.

Drag and drop, or click to choose a file.

Supports: MP3, MPEG, MP2, MPGA, WAV, AIFF, AIF, FLAC, AAC, OGG, OGA, OPUS, M4A, MP4, WEBM, WMA, ALAC, AMRUp to 512 MB. Supports long recordings, including two-hour files.Your audio stays on your device. No upload or sign-up.

neuralanalog

Bring missing detail
back to your audio

Reduce compression and recording artifacts
Regenerate coherent high frequencies
Export cleaner, studio-ready audio

Restore your audio

Trusted by 80,000+ music lovers

N
“Does amazing job in restoring Audio from bad quality MP3s and badly extracted audio from CDs. Always my go to for audio restoration.”
— N.

R
“It can bring back clarity without making everything sound too artificial or overprocessed. Stem separation is also surprisingly clean.”
— R.

“Amazing tool for audio. Clean, simple, and effective. I would spend hours in RX to get the same results. Give it a try. I can save you hours of production time.”
— Dan Campbell ~Riffster

“I've been loving the app. The audio restoration works amazing on my suno songs”
— Jordi

N
“Does amazing job in restoring Audio from bad quality MP3s and badly extracted audio from CDs. Always my go to for audio restoration.”
— N.

R
“It can bring back clarity without making everything sound too artificial or overprocessed. Stem separation is also surprisingly clean.”
— R.

“Amazing tool for audio. Clean, simple, and effective. I would spend hours in RX to get the same results. Give it a try. I can save you hours of production time.”
— Dan Campbell ~Riffster

“I've been loving the app. The audio restoration works amazing on my suno songs”
— Jordi

How to make a spectrogram online

Open an MP3, WAV, FLAC, M4A, or another supported audio file in the spectrogram generator above.
View the whole recording or zoom into a section. Play the audio to connect what you see with what you hear.
Choose mono, left/right, or mid/side channels, then select Download PNG to save the displayed spectrogram.

View the whole recording, then zoom into the details

Inspect a complete song, podcast, field recording, or two-hour mix in one overview. You can see the full timeline without playing the recording from start to finish. Zoom into any section to examine short events and frequency detail.

Audio files can be up to 512 MB. Analysis time depends on the recording and your device.

Compare left/right and mid/side spectrograms

View left and right channels separately to spot differences in noise, tone, and stereo content. Switch to mid/side to inspect the shared center signal and the differences between the two channels.

Use the channel button beside the zoom controls to cycle between M (combined mono), L/R (left/right), and M/S (mid/side). Stereo modes show two spectrograms, one for each channel. Mono files stay in the mono view.

Export your spectrogram as a PNG image

Download the full-recording overview or a zoomed section as a PNG for analysis notes, reports, teaching, or sharing. The image captures your displayed channel view, with frequency labels and the recording duration or selected time range.

How to read an audio spectrogram

A spectrogram shows how the frequencies in your audio change over time. Time runs left to right, frequency runs bottom to top, and brighter colors show stronger energy. A waveform shows the signal amplitude over time; a spectrogram also shows which frequencies are present.

Look for sustained tones and harmonics as horizontal bands.
Locate short clicks and percussion as brief vertical marks.
Inspect steady hum, background hiss, and gaps in the sound.
Check for abrupt high-frequency cutoffs that may indicate lossy compression. A cutoff alone does not prove a file is lossy or identify its bitrate.

Looking for a spectrogram decoder? Some songs and audio puzzles contain hidden images or text in their frequency patterns. You can inspect those patterns visually here; the viewer does not automatically recognize or decrypt messages.

Private audio analysis in your browser

Your audio is analyzed on your device and never uploaded. Inspect unreleased music, client recordings, podcast edits, and private conversations without sending the file to a server. You can generate and export a spectrogram without creating an account or installing an app.

Restore missing detail in your audio

If your audio sounds muffled or damaged by compression, AI Audio Upscaling can rebuild missing high-frequency detail and reduce artifacts for a clearer, fuller sound. Import your file into Studio, preview the original and restored audio, then export your restored WAV.