M4A to MP4 converter
Turn an M4A audio file into a MP4 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.
M4A to MP4 — common questions
Is the M4A to MP4 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 M4A into MP4?
Platforms like YouTube, Instagram, and most social feeds require a video file — turning your M4A into MP4 with a cover image lets you upload audio anywhere that only accepts video.