[← Free tools](https://tryflowdrive.com/tools) # MP3 to WEBM converter

 Turn an MP3 audio file into a WEBM video — perfect for uploading music, podcasts, or voiceovers to platforms that only accept video. Add your own cover image, or use a clean background. Everything runs locally in your browser.

  100% private — your file is processed locally and never leaves your device.

  Drag & drop your audio here

 or click to browse — MP3, WAV, M4A, AAC, OGG, FLAC

 FAQ ## MP3 to WEBM — common questions

 ### Is the MP3 to WEBM converter free?

 Yes — it's completely free, with no sign-up and no watermark on the video.

### Are my files uploaded to a server?

 No. The video is built entirely in your browser, so your audio and image never leave your device.

### Do I have to add a cover image?

 No — a cover image is optional. Add a JPG or PNG to show artwork, or leave it blank and we'll use a clean solid background.

### How long can the audio be?

 The finished video matches your audio length exactly. Longer tracks take longer to render since everything is processed locally.

### Why turn MP3 into WEBM?

 Platforms like YouTube, Instagram, and most social feeds require a video file — turning your MP3 into WEBM with a cover image lets you upload audio anywhere that only accepts video.

 Related ## Other conversions

 [MP3 → MP4](https://tryflowdrive.com/tools/mp3-to-mp4)[MP3 → MOV](https://tryflowdrive.com/tools/mp3-to-mov)

 [See all free tools →](https://tryflowdrive.com/tools)