Select eligible WAV files
Add non-empty .wav files up to 100 MB each. The source must contain audio that host FFmpeg can read.
Server-backed WAV to MP4 conversion
Wrap WAV audio in a new AAC MP4 file.
Convert eligible WAV audio into fast-start, audio-only MP4 downloads with AAC encoded at 160k.
- AAC at 160k
- Fast-start audio MP4
- 100 MB per file
Processed by our self-hosted conversion engine
Supported files
WAV source, MP4 result.
WAVMP4
A supported WAV source is decoded and its first audio stream is written as AAC at 160k in a new audio-only, fast-start MP4.
How it works
Queue WAV files, then download new MP4 audio.
Run the fixed conversion
Start the queue to process one file at a time with this route’s AAC at 160k FFmpeg profile.
Check and download each MP4
Review a completed result in compatible software, then download its separately named MP4 file.
Processing boundaries
Fixed AAC at 160k output from the first audio stream.
The profile maps only the first audio stream, excludes video, removes metadata and chapters, encodes AAC at 160k, and moves MP4 indexing data for fast start.
Convert WAV to MP4WAV files up to 100 MB
Only non-empty .wav uploads of 100 MB or less are accepted. Unsupported or unreadable audio sources cannot be converted.
New AAC at 160k encoding
This is a new AAC encode, not a stream copy. The MP4 contains no video, and its final size or compatibility is not guaranteed.
First audio stream only
Only the first audio stream is mapped. Video, alternate tracks, subtitles, and attachments are excluded from this audio-only result.
No source tags or editing controls
Source metadata and chapters are removed. This route provides no trim, stream-selection, bitrate, sample-rate, channel, or quality controls.
WAV-to-MP4 details
Understand the file before you convert
Which WAV files can I upload?+−
Use non-empty .wav files up to 100 MB. Host FFmpeg must be able to read an audio stream in the source.
What does the downloaded MP4 contain?+−
A successful conversion contains a newly encoded, audio-only MP4 result from only the first audio stream using AAC at 160k.
Can I add more than one file?+−
Yes. Add multiple eligible files. The browser submits each queue item sequentially and every completed result has a separate download.
Is WAV to MP4 a stream copy?+−
This is a new AAC encode, not a stream copy. The MP4 contains no video, and its final size or compatibility is not guaranteed.
Will source metadata or chapters remain?+−
No. The conversion profile removes source metadata and chapters. Alternate audio tracks, video, subtitles, and attachments are not included.
Can I change MP4 settings or trim the audio?+−
No. There are no trimming, stream-selection, bitrate, sample-rate, channel, codec, or video controls.
Does the preview guarantee the conversion will succeed?+−
No. Browser playback support and host FFmpeg readability are different checks. A file must be readable by FFmpeg for conversion, and playback depends on browser support.