Convert AAC to MP4 Video Online Free
Runs 100% in your browser — your files never leave your device.
Platforms like YouTube, Instagram, and TikTok insist on video even when you only have sound. This tool wraps your AAC track into a real MP4 with a tidy neutral still frame as the picture, encoded locally for typical files. Larger ones finish on our servers — delete the result right after processing, or let it auto-delete within an hour.
How it works
- 1
Add your file
Drop it in or click to browse. Typical files convert entirely on your device.
- 2
Convert the audio
Large files finish on our servers instead — delete them right after processing, or let them auto-delete within an hour.
- 3
Download
Save the converted file instantly — free, no watermark, no account.
About this tool
Wrapping AAC audio into MP4 video
Platforms like YouTube, Instagram, and TikTok insist on video even when you only have sound. The tool wraps your AAC track into a real MP4 with a clean neutral still frame as the picture — encoded locally in your browser for typical files, with larger ones finishing on our servers and auto-deleting within an hour.
What to check after converting
Play the MP4 in your target platform's uploader — the video track is a static frame, so verify the audio carries the full length and nothing cut off. The original AAC file stays untouched on your device.
Frequently asked questions
Can I use a custom image instead of the neutral frame?
This tool wraps audio with a clean generated frame. For branded visuals, use a video editor — the MP4 here is built for platforms that simply require a video file.
Why does the platform need video for audio content?
Most social and video platforms treat audio-only uploads as invalid — wrapping the track in a video container is the standard workaround for podcasts, music, and audiogram content.
Is my audio uploaded anywhere?
Small files convert entirely in your browser. Larger ones process on our servers and auto-delete within one hour — nothing is kept or shared.