Convert WAV to MP4, Free
Upload your WAV file and get a MP4 in seconds. No account, no watermark.
How to convert WAV to MP4
Converting a WAV audio file to MP4 produces a video file with the audio on a static background image or solid color background, which is required when you need to share audio on platforms that only accept video formats, such as Instagram, YouTube, TikTok, or certain email systems that strip audio attachments.
BoltConverter converts your WAV audio to an MP4 video on our servers, placing the audio over a static visual background. The output is a valid MP4 file that video platforms will accept. The audio quality from your WAV is preserved in the output. After conversion, both files are deleted from the server.
Upload your WAV file
Click the upload area or drag your .wav audio file onto the page.
Audio is packaged in an MP4 container
BoltConverter wraps your WAV audio in an MP4 container on our servers, with a static black or solid-color background for the video track.
Download the MP4
Click Download to save the MP4 file for uploading to video platforms or sharing in contexts that require video format.
Frequently asked questions
Why would I convert audio to MP4?
Many platforms (Instagram, TikTok, YouTube) only accept video uploads. Converting your audio file to an MP4 with a static background lets you share audio content on those platforms.
Does the output have any actual video content?
The video track is a static image (typically a solid color). All the meaningful content is in the audio track, which is encoded from your WAV at high quality.
Will the audio quality change?
The audio is re-encoded from WAV (lossless) to AAC or another compressed format for the MP4 container. This introduces minimal compression at a high-quality setting.
Is there a file size or length limit?
WAV files up to 100 MB are supported. WAV files are uncompressed, so even a few minutes of audio can be tens of MB.
Are my files stored after conversion?
No. Both the uploaded WAV and the resulting MP4 are deleted from our servers immediately after you download the result.