01
Video Compressor
Shrinks a video so it fits an email or a WhatsApp limit, re-encoding with H.264 in your…
Audio Waveform Image Generator
Draws an audio file as a waveform PNG using min and max per column, the way an audio editor does.
Video & Audio
Nothing uploaded
No sign-up
Free, unlimited
Drop an audio filerendered in this page — nothing is uploaded
Add a file to begin.
In short
A waveform image should draw the minimum and maximum sample in each pixel column, not their average. Averaging cancels positive peaks against negative ones, so loud music drawn that way comes out as a thin, quiet-looking line that resembles nothing an audio editor would show. With thousands of samples behind every pixel there is no other honest way to represent them — the column has to show the range the signal covered, not a number in the middle of it. This tool draws min and max, so the result matches what you would see in a DAW.
How to use the Audio Waveform Image Generator
- Drop the audio file in.
- Set the size and colours.
- Download the PNG.
About the Audio Waveform Image Generator
The Audio Waveform Image Generator draws an audio file as a waveform PNG using min and max per column, the way an audio editor does. It runs as plain JavaScript inside the page, which means there is no upload step, no queue and no size limit imposed by a server — the only limit is your own device.
What people use it for
- Making a waveform graphic for a podcast episode page.
- Illustrating an audio post.
- Getting a visual overview of a long recording.
Details
| Drawing | Minimum and maximum per pixel column |
|---|---|
| Not | An average — that makes loud music look quiet |
| Channel | The left channel |
| Output | PNG, optionally with a transparent background |
The centre line is worth keeping on for anything technical. A waveform sitting off-centre indicates DC offset, which wastes headroom and is invisible without a reference line through the middle.
Where this tool stops
Draws one channel at whatever resolution you request. It is a picture rather than a measurement — use the File Inspector for peak and RMS figures.
Frequently asked questions
Why does my waveform look different from other tools?
Most likely because they average and this does not. At 1,600 pixels wide a five-minute track has about eight thousand samples behind every column; averaging them cancels the positive against the negative and produces a thin line regardless of how loud the music is. Min and max shows the range the signal actually covered.
Can I get a transparent background?
Yes, and remember it will be invisible against a background of the same colour as the waveform. Pick the waveform colour for where the image will sit, not for how it looks here.
Which channel is drawn?
The left one. A stereo file with genuinely different channels is not represented by either alone — the Stereo Width Meter is the tool for seeing how different they are.
Are there any usage caps on the Audio Waveform Image Generator?
There is no cost and no cap. The Audio Waveform Image Generator is not a demo of a paid product, so nothing is held back or watermarked.
Is what I paste into the Audio Waveform Image Generator stored?
No. The Audio Waveform Image Generator runs entirely in your browser using JavaScript. Nothing is transmitted, logged or stored, which you can verify yourself in the Network tab of your browser's developer tools.
What do people use the Audio Waveform Image Generator for most?
Typical uses: making a waveform graphic for a podcast episode page. Illustrating an audio post. Getting a visual overview of a long recording. It is built for exactly those cases rather than being a general-purpose tool with this bolted on.
Is there anything the Audio Waveform Image Generator cannot do?
Draws one channel at whatever resolution you request. It is a picture rather than a measurement — use the File Inspector for peak and RMS figures. Knowing where a tool stops being trustworthy matters more than the cases where it works.
What figures does the Audio Waveform Image Generator work from?
Drawing is Minimum and maximum per pixel column. Not is An average — that makes loud music look quiet. Channel is The left channel. These are printed on the page itself, so you do not have to take them on trust.
Will a big file be rejected?
There is no limit set by us, because your file is never uploaded — the only ceiling is the memory your own browser will give the tab. Very large files simply take longer to process, and a phone will give up sooner than a desktop.
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