Spectrogram & Waveform Image
Visualize any audio file as a spectrogram or waveform PNG. No upload, no signup.
Drop your audio file here
or click to browse a file
Pick a visualization, set image size, and render. Output is a PNG.
Visualization
About this spectrogram & waveform tool
Two visualizations of the same audio file in one tool. The spectrogram plots frequency content over time — bright bands show where the energy is, low frequencies at the bottom, highs at the top. The waveform shows amplitude over time — useful for spotting clipping, silence and rough cuts at a glance.
The output is a PNG you can download, embed in a blog, or print for class.
How to make a spectrogram online
- 01
Drop in audio
MP3, WAV, FLAC, OGG, M4A and more — any common audio format.
- 02
Pick spectrogram or waveform
Choose the visualization you want and the image size.
- 03
Download the PNG
The image is rendered and offered as a download.
Why use this visualizer
- Spectrogram (frequency over time) and waveform (amplitude over time)
- Output sizes from 1200×600 up to 2400×1200
- Output keeps a clean PNG — no watermark
- Free, private, no install
- Free, no signup, no length cap
- Useful for music producers, audio engineers, podcasters, teachers and ML datasets
Spectrogram FAQ
What is a spectrogram?
A 2D plot showing how the frequency content of a signal changes over time. Time runs left to right, frequency bottom (low) to top (high), and brightness shows energy at that frequency.
What's a waveform image good for?
A quick visual of how loud the audio is at every moment. It shows clipping, silence, dynamic range and structural features (verses vs choruses) at a glance.
How long can the audio be?
There's no fixed cap, but very long files render proportionally larger images. For multi-hour recordings, downsample first or trim a section.
Can I use the image commercially?
Yes — it's just a PNG of your own audio file. There's no watermark added.
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