Audio Waveform Generator

The tool supports any audio format your browser can decode through the Web Audio API. This includes MP3, WAV, OGG, FLAC, AAC, M4A, WebM, and Opus. If your browser plays it, the tool can generate a waveform from it.

No. All audio processing happens entirely in your browser using the Web Audio API and Canvas API. No data is sent to any server, and no audio content leaves your device. Your files stay private and local.

Bars draws vertical rectangles rising from the bottom baseline. Line draws a continuous connected path through the peak values. Mirror creates symmetric bars extending both up and down from the center with a reflection effect on the lower half. Filled draws the same path as Line but fills the area beneath it with a semi-transparent color.

Normalization scales all peak amplitudes so the loudest section of the audio maps to the full display height. This ensures quiet recordings produce the same visual amplitude as loud ones. When disabled, the waveform reflects the raw relative loudness of the audio, which is useful for comparing volume levels across a recording.

The Gain slider multiplies all amplitude values by a factor between 0.1x and 3.0x. This lets you visually amplify quiet passages or attenuate loud ones without changing the underlying audio data. When combined with normalization, gain is applied after the normalization pass.

Resolution determines how many vertical segments the waveform is divided into. Fewer samples (e.g., 50) produce a sparse, chunky look with thick bars. More samples (e.g., 400) produce a dense, detailed waveform with thinner bars or more line points. The default of 150 works well for most use cases.

Once your waveform is displayed, scroll to the Export section. Set your desired Width and Height in pixels (default is 1920x400), then click either the PNG or SVG download button. PNG produces a raster image at the exact pixel dimensions specified. SVG produces a scalable vector file that looks sharp at any size.

PNG is a raster image format — it renders the waveform at a fixed pixel resolution. It is ideal for direct use in social media posts, thumbnails, and applications that require pixel-based images. SVG is a vector format — it stores the waveform as mathematical shapes that scale infinitely without quality loss. It is ideal for web design, print materials, and situations where you need to resize the waveform later.

This usually means the audio file is very quiet or contains long silent sections. Enable the Normalize option to scale the peaks to the full display height, and increase the Gain slider to amplify the visual amplitude. If the file is entirely silent, the waveform will correctly display as a flat line.

Yes. The waveform visualizations are generated from your own audio data and you own the output. You can use the exported PNG and SVG files in commercial projects, podcast artwork, album covers, videos, websites, and any other context without restriction.

Yes, but extremely long files (over 60 minutes) may take several seconds to decode depending on your device's processing power and available memory. A loading indicator is displayed during decoding. The waveform itself renders instantly regardless of audio length since the data is downsampled to your chosen resolution.

The Time Axis toggle adds evenly-spaced tick marks and timestamps along the bottom edge of the waveform. Tick intervals are automatically calculated based on the audio duration — for short clips you might see tenths of a second, while longer tracks show minute markers. This is useful for identifying positions in the audio visually.