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Libre Audio to Video

Turn an audio file plus a cover image into an MP4 — the standard way to upload a song, mix, or podcast to YouTube. Runs entirely in your browser.

Sen límite de tamaño de ficheiroOs ficheiros permanecen privadosNon é necesario iniciar sesiónLibre para sempre

1. Audio (the soundtrack)

Drop an audio file

MP3, WAV, FLAC, OGG, AAC, M4A, Audio sen límite de tamaño de ficheiro

Explorar ficheiros

2. Cover image (shown the whole time)

Drop a cover image

PNG, JPG, WebP, Image sen límite de tamaño de ficheiro

Explorar ficheiros

Os teus ficheiros nunca saen do teu dispositivo. Todo o procesamento realízase localmente no teu navegador.

💡 Combine an audio track with a still image to make a simple MP4 — the standard way to put a song, mix, or podcast episode on a video platform. Files stay in your browser; nothing is uploaded. (Keep total size under ~2 GB on this device.)

Optimize for your platform

Upload a Song to YouTube Post a Podcast Episode as Video Share Audio on Instagram Publish a DJ Mix as Video Turn a Voice Recording into a Video

Como funciona

Video platforms like YouTube need a video file, not just audio. The standard trick is to show a single cover image for the whole track. This builds that MP4 with FFmpeg in your browser.

1
FFmpeg.wasm loads once
The WebAssembly build downloads on first use and is cached afterwards.
2
You add an audio file and a cover image
Both are read locally — never uploaded.
3
FFmpeg renders the video
The still image is looped for the full length of the audio (-shortest) and encoded to H.264 MP4 with the audio as an AAC track.
4
You download the MP4
The result is ready to upload to YouTube, Instagram, or anywhere that needs video.