WAV to MP4 Converter

Free online WAV to MP4 converter

MP4 to MP3 is a free WAV to MP4 converter that takes any WAV audio file you upload and wraps it in an MP4 video container with a static visual background. This is useful when you have audio (a podcast, song, voice memo, lecture, or interview) that you want to upload to a video-only platform like YouTube, Instagram, TikTok, or Facebook — most of which don't accept raw audio uploads.

Because we use FFmpeg under the hood, the conversion is identical to what you'd get from a desktop video editor. Your WAV file is uploaded over HTTPS, paired with a static image (a black background by default), and encoded as a standard MP4 file with H.264 video and AAC audio. The original WAV and the temporary MP4 are both deleted automatically after the conversion completes.

This tool is built for your own content only. It does not connect to streaming platforms, music services, or any other platform. Converting copyrighted music or audio that you do not own is illegal and against our Terms of Service.

Why convert WAV to MP4?

WAV is an audio-only format. Many popular platforms — YouTube, Instagram, TikTok, Facebook, Twitter/X — only accept video uploads. If you want to share a podcast episode, a song, a lecture, or an interview on those platforms, you need to wrap your audio in a video container first.

Converting WAV to MP4 solves this by adding a static visual (usually a black background or album-art image) alongside your audio. The resulting MP4 file can be uploaded to any video platform, where it will play as an audio track with a static image visible to viewers.

If you need to do the reverse — extract audio from an MP4 video — use our MP4 to MP3 or MP4 to WAV converter. To convert a different audio format like M4A, try our M4A to MP4 converter.

• Upload podcast episodes to YouTube as audio-only videos
• Share songs or demos on Instagram, TikTok, or Facebook
• Publish lecture or interview audio on video platforms
• Distribute voice memos or audiograms without a video editor
• Convert any audio file into a format video platforms accept

How the WAV to MP4 conversion works

When you upload a WAV file, our backend passes it to FFmpeg. FFmpeg re-encodes the WAV audio as AAC (the standard audio codec for MP4), generates a static black image as the video track (H.264, 1920×1080 by default), and muxes both into a standard MP4 container. The audio quality is preserved as closely as possible — AAC at a high bitrate is essentially indistinguishable from WAV for most listeners.

The whole conversion typically takes 10 to 60 seconds depending on the length of your audio. The output file is a standard MP4 that will play in any video player, browser, or social media platform.

WAV to MP4 vs MP4 to WAV — what's the difference?

These are opposite conversions. WAV to MP4 takes audio and wraps it in a video container (useful for uploading audio to video platforms). MP4 to WAV takes a video file and extracts just the audio as a lossless WAV file (useful for editing and archival).

If you have a video file and want the audio, use MP4 to WAV or MP4 to MP3. If you have audio and want a video, you're in the right place — upload your WAV above.