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Audio Waveform Generator (Free, Online, No Upload)

Generate a waveform visualization from any audio file right in your browser. Nothing gets uploaded to a server. Waveform images are useful for podcasts, music production, and audio editing interfaces. The generation runs locally using FFmpeg compiled for your browser.

Try it in your browser

Loading FFmpeg engine... (~31 MB)

Use the API

curl -X POST https://renderio.dev/api/v1/run-ffmpeg-command \
  -H "X-API-KEY: ffsk_your_api_key" \
  -H "Content-Type: application/json" \
  -d '{
  "ffmpeg_command": "-i {in_audio} -filter_complex \"showwavespic=s=1920x240:colors=0x3B82F6\" -frames:v 1 {out_video}",
  "input_files": {
    "in_audio": "https://example.com/input.mp3"
  },
  "output_files": {
    "out_video": "output.png"
  }
}'

Need an API key? Get your free API key to start processing files programmatically.

Common Variations

Taller waveform (480px)
-i input.mp3 -filter_complex "showwavespic=s=1920x480:colors=0x3B82F6" -frames:v 1 output.png
Custom color (green)
-i input.mp3 -filter_complex "showwavespic=s=1920x240:colors=0x22C55E" -frames:v 1 output.png
Split channels display
-i input.mp3 -filter_complex "showwavespic=s=1920x480:colors=0x3B82F6|0xEF4444:split_channels=1" -frames:v 1 output.png

Related Operations

Video to MP3 Converter Online Free, No Upload | RenderIOFree Video to WAV Converter Online | RenderIOExtract Audio from Video Online Free - No Upload | RenderIOFree Video to Thumbnail Generator Online | RenderIO

Need to process at scale?

Automate this with the RenderIO FFmpeg API. Process thousands of files programmatically or through no-code video automation.

Get your API key