免费 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.
Drop an audio file
MP3, WAV, FLAC, OGG, AAC, M4A, Audio 无文件大小限制
Drop a cover image
PNG, JPG, WebP, Image 无文件大小限制
你的文件永远不会离开你的设备。所有处理都在你的浏览器中本地进行。
💡 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
工作原理
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.
- 1FFmpeg.wasm loads onceThe WebAssembly build downloads on first use and is cached afterwards.
- 2You add an audio file and a cover imageBoth are read locally — never uploaded.
- 3FFmpeg renders the videoThe 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.
- 4You download the MP4The result is ready to upload to YouTube, Instagram, or anywhere that needs video.
Turn a song, DJ mix, or podcast episode into an uploadable video without sending your audio to a server — everything runs on your device.