Audio Waveform Video Maker
Turn an audio file into an MP4 with an animated waveform — ready to upload to YouTube, podcasts, or social.
Local processing only — your file never leaves the browserWhat this tool does
- Animated waveform rendered over your audio at 1280×720, 25 fps
- Choose the waveform style (line / point-to-point / centered) and color
- H.264 + AAC output that uploads cleanly to YouTube and social platforms
- Runs locally with ffmpeg.wasm — your audio never leaves your device
How to use
- 1
Drop an audio file
MP3, WAV, M4A, FLAC, and more. Keep it short for a fast render.
- 2
Pick a style and color
Line is the classic look; centered mirrors the wave; point-to-point is sparser.
- 3
Render and download
The waveform video is encoded to MP4. Preview, then download.
What each setting means
Common pitfalls
Symptom: Rendering takes a very long time
Cause: Drawing a frame per 1/25s of audio is roughly real-time in the browser.
Fix: Use shorter clips; a 10-minute song renders in roughly ten minutes. Trim first if you only need a segment.
Symptom: The video has no sound
Cause: The source had no decodable audio stream, or it failed to map.
Fix: Confirm the input actually contains audio; re-export it as a standard MP3/WAV and try again.
Symptom: The waveform looks flat
Cause: Very quiet audio produces a small wave.
Fix: Normalize the loudness first (see the Volume Normalizer), then render.
Equivalent FFmpeg commands
Reference commands you can run on the desktop FFmpeg CLI.
ffmpeg -i in.mp3 -filter_complex "[0:a]showwaves=s=1280x720:mode=line:rate=25:colors=white,format=yuv420p[v]" -map "[v]" -map 0:a:0? -c:v libx264 -preset veryfast -crf 24 -c:a aac -b:a 192k -shortest -movflags +faststart out.mp4Browser support & limits
- Rendering is roughly real-time in the browser; audio is capped at 10 minutes.
- Fixed 1280×720 / 25 fps output; no custom resolution or per-frequency spectrum view.
Privacy
This tool runs ffmpeg.wasm directly in your browser. Files never leave your device — everything runs locally. Read the privacy policy →
Frequently asked questions
What resolution and frame rate is the output?
1280×720 at 25 fps, H.264 video with AAC audio — a good balance for YouTube and social while keeping in-browser rendering practical.
How long can the audio be?
Up to 10 minutes. Rendering is roughly real-time, so longer clips take proportionally longer; a warning appears past 3 minutes.
Can I change the waveform look?
Yes — pick the style (line / point-to-point / centered) and the stroke color. The background is black.
Is my audio uploaded?
No. Everything runs in your browser via ffmpeg.wasm; the file never leaves your device.