About Wayvl

Audio does not travel well on social platforms. X, Threads, Instagram, TikTok and YouTube all want video. So every time someone wants to share a podcast clip, a voice note, a demo track or a good line from an interview, they have to turn it into a video first. That video is called an audiogram.

The existing tools all wanted an account, an upload, a subscription, or all three, and then stamped a watermark on the result. That is a lot of ceremony for a thirty second clip. Wayvl does the same job in a browser tab, for free, without ever seeing your file.

How it works

Every step runs on your machine:

• Your file is decoded with the Web Audio API, which gives raw samples. Video files go the same way: the audio track is pulled out and the picture is ignored.
• Wayvl analyses those samples once, into 64 frequency bands plus the beats, so the waveform is measured from the audio itself rather than sampled live from a playing analyser. That is why the preview and the exported file match frame for frame.
• Each frame is drawn on an offscreen canvas at full export resolution.
• WebCodecs encodes H.264 video at 30 fps and AAC audio at 48 kHz (Opus where a browser cannot write AAC), and an MP4 muxer running in the page assembles the two into a file.
• The file appears as a download. No request ever carries your audio anywhere.

What you get

• Four formats: 1080x1080 square, 1080x1920 vertical, 1920x1080 landscape and 1080x1350 portrait.
• Eleven waveform styles: mirrored, bars, glow line, mountain, flow, dot matrix, stereo and timeline, plus radial, pulse ring and particles around your cover art.
• 22 gradient fills for the waveform, or any single colour.
• Ten templates to start from, and a brand kit that keeps your look, logo and font for next time.
• Nine preset backgrounds, blurred cover art, or a custom colour or image.
• Title, subtitle, cover art, your logo, five title fonts or your own, progress bar and a handle watermark that is yours, not mine.
• Captions transcribed on your device, in eight styles, with SRT, VTT and text downloads.
• Clips up to five minutes, trimmed on a waveform strip.
• Audio or video in: mp3, wav, m4a, aac, ogg, flac, mp4, mov, webm and mkv.

The catch

Exporting needs the WebCodecs API, which today means Chrome or Edge on desktop, Chrome on Android, and Safari on iPhone, iPad and Mac from iOS 16.4 and macOS 13.3. Firefox can load audio and use the live preview but cannot write the MP4.

Who made it

Wayvl is built by Dylan, who posts about the things he builds as @Dylveloper on X. It is free, paid for by a few marked affiliate links, and there is no upsell behind it.

Bugs, feature requests and screenshots of things that look wrong are all welcome. Email them to support@sundrymill.com or send them as a DM to @Dylveloper on X. The contact page has the details.