TinySandyFree Online Tools

Audio Waveform Viewer

See the shape of any recording at a glance. The viewer decodes your audio file, draws its waveform and reports its duration, channels, sample rate, peak and RMS levels. Choose a style, size and colours and download the waveform as a PNG for a podcast cover, a video overlay, a presentation or an audio-editing note.

Audio Editing Runs in your browser

Draw the Waveform of an Audio File

Drag and drop an audio file here, or click to browseMP3, WAV, OGG, M4A/AAC, FLAC or WebM audio that your browser can decode. Up to 100 MB.
px
px

How to Use the Audio Waveform Viewer

  1. Add an audio file.
  2. Choose a style, the image size and the colours.
  3. Press Generate to draw the waveform and calculate its levels.
  4. Download the PNG image.

About This Tool

Podcasters and musicians making artwork, teachers explaining sound, and editors checking where the loud and quiet parts of a file are.

Input: MP3, WAV, OGG, M4A/AAC, FLAC, WebM audio  ·  Output: PNG image + level statistics.

Features and Limitations

Features

  • Three styles: classic waveform, rounded bars and separate channels.
  • Any size from 200 to 4000 pixels wide, with a transparent background option.
  • Peak and RMS levels in dBFS, duration, channels and sample rate.
  • Your audio is analysed locally.

Limitations

  • The waveform shows amplitude over time, not frequency content (it is not a spectrogram).
  • Very long files are summarised: each pixel column represents many thousands of samples.
  • Processing happens on your device, so very large files depend on your browser's available memory.

Frequently Asked Questions

What is the difference between peak and RMS?

Peak is the single loudest sample. RMS is the average energy, which is closer to how loud the audio sounds over time.

Can I get a transparent PNG?

Yes. Tick Transparent background and only the waveform is drawn.

Why do the bars look the same height?

Heavily compressed (loud) music has little dynamic range, so its waveform looks like a solid block. That is a property of the recording.

Is the file uploaded?

No. Decoding and drawing happen in your browser.

Related Tools

More like this: all Audio Editing tools, all Audio & Video tools or the TinySandy home page.