What does a flat waveform mean?
Very low amplitude, meaning the recording is quiet or near-silent. Run it through Normalize Audio to raise the level.
All free toolsAudio tool · 100% free
Audio Waveform
Generate a waveform image from an audio file. Podcasts, music posts and video thumbnails routinely use one, and it is also the quickest way to see whether a recording is clipping or nearly silent. It is free, needs no account, and adds no watermark to your result.
Built for: audio waveform
Deleted as soon as you download itFree · fair-use only
Drop audio files herePNG output · up to 100 files
Included in this tool
Waveform PNGCustom dimensionsStereo visualizationBatch processing
When you need this
What people use it for.
Creating waveform artwork for a podcast episode or audio post
Checking visually whether a recording is clipped or too quiet
Producing a visual element for an audio-only video upload
How it works
What happens to your file.
FFmpeg renders the amplitude envelope of the audio across time into a PNG image using its showwavespic filter.
What this tool includes
Everything you need, without a paywall.
Waveform PNG
Custom dimensions
Stereo visualization
Batch processing
Questions
Common questions.
What does a solid block mean?
The signal is at or near maximum for long stretches, which usually indicates clipping or heavy compression.
Can I change the image size or colour?
The output is a PNG you can restyle afterwards with the image tools.
Related free tools
You might also need.
162
Normalize Audio
165Normalize perceived loudness using FFmpeg loudnorm processing for more consistent playback volume.
Audio Metadata Viewer
163Inspect codec, sample rate, channels, duration, bitrate, tags and stream metadata using ffprobe.
Change Audio Volume
160Raise or lower audio volume by a selected percentage or decibel amount and export a new audio file.
Audio Compressor
Reduce audio size by re-encoding to MP3 or AAC at a selected bitrate while preserving normal playback compatibility.