Turn audio into a waveform image
The wavy sound picture you see under a podcast title, on an episode cover or laid over a video. Drop the audio, adjust the look, download the image.
- Runs entirely in your browser
- Works offline
- No upload
- No sign-up
- No watermark
Loading the tool…
How it works
- Drop an audio file.
- Pick the style — bars or a filled line — plus colours and size. The preview updates as you move things.
- Download as PNG for direct use, or SVG to scale and recolour it later.
Why nothing is uploaded
Every operation on this page is done by code running inside your browser tab, using the same engine that renders web pages. The file is read from disk into your tab’s memory, transformed there, and written back out as a download. It is never sent anywhere — not to us, not to a third party.
Verify it yourself
- Open your browser’s developer tools (F12) and select the Network tab.
- Load your file and run the tool.
- The only requests you will see fetch the tool’s own code — and, for a few heavy tools, their open-source engine from a public CDN — plus one small page-view ping to loreatec.jp (page address and title, nothing more). None of them carry your file.
Frequently asked questions
PNG or SVG?
SVG if you still plan to work on the image — it can be enlarged without blurring and recoloured in design programs such as Illustrator or Inkscape. PNG if it goes straight where it will be used. Both are drawn from the same reading of the audio.
What does the waveform actually show?
How loud the sound is over time. The audio is divided into as many slices as there are bars, and each bar is as tall as the loudest moment in its slice. Speech shows the gaps between phrases; music shows the structure of the song. It shows volume, not how high or low the notes are.
Why does my file look like a solid block?
Because it is loud all the way through. Much modern music is produced to stay close to maximum volume, so its waveform really is a solid block. Speech, acoustic recordings and anything with pauses draw more interesting shapes.
Which formats can it read?
Any format your browser can play, which in practice means MP3, WAV, M4A/AAC, OGG and FLAC in any modern browser. The browser reads the file with the same built-in player it uses for audio on any web page, so nothing extra has to be downloaded.