QRix
Audio in → video out, with a live animated waveform visual.
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Yes — completely free, no watermark, no signup, no file limits beyond your device's memory.
No — everything runs on your device in the browser. Your videos never leave your computer.
Real MP4 (H.264) where your browser can encode it — Chrome, Edge and Safari — with WebM (VP9) as an automatic fallback elsewhere. Everything is transcoded on your device; nothing is uploaded.
MP3 to MP4 converts audio into a shareable video: your track plays over an animated neon waveform rendered in real time. Ideal for Instagram, YouTube and Telegram where audio files can't be posted directly. Runs fully on-device.
It's free, private and works right in your browser — no signup, no watermark.