Encode qualified WAV audio as high-quality Opus, with an explicit 48 kHz policy, SoXR resampling when needed and verified timing.
On-device audio processing
Convert your audio
Free to use · No sign-up
Loading the local audio converter. Choose a file, review its detected format and output settings, then convert and check the download.
Three simple steps
Keep your original
1
Choose your audio
Select a recording and check the detected codec, rate and channels.
2
Choose an output
Review the resolved quality settings and any required changes.
3
Check and download
Read the warnings, listen and test the saved file in its destination.
A modern delivery option
Opus can be useful for speech and music when your destination supports it. This export is lossy, so keep the WAV master. Check compatibility before converting a collection for a player that may only accept MP3 or AAC.
The resolved quality settings
The qualified path uses 128 kbps mono or 256 kbps stereo VBR, complexity 10 and 20 ms packets. It accepts admitted integer16/24 and float32 WAV. A 32-bit integer WAV is refused for this encoder instead of silently reducing its precision.
The 48 kHz policy is explicit
Opus output is 48 kHz. A matching-rate source bypasses resampling; a different admitted rate uses SoXR precision 28. That changes the sample grid, not the historical quality of the original recording. For example, a 44.1 kHz WAV needs a disclosed rate conversion; a 48 kHz WAV does not.
Check the actual output
The writer verifies Opus headers, packet granules, pre-skip, terminal padding and decoded frame count. The final file is compared with an equivalent native quality path in desktop tests. This is not a universal listening-quality guarantee. Read sample rate explained and the test evidence.
Testable preview. Keep your originals and check downloaded results. Send useful feedback without attaching private recordings.
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Can WAV restore quality lost in an MP3?
No. WAV can preserve the decoded signal without a new lossy encoding, but cannot recreate information already discarded.
Why was my file or output refused?
The actual codec, precision, layout or timing may fall outside the qualified subset. The app explains the restriction rather than silently reducing quality. See supported formats.
Does the maximum file size work on every device?
No. Limits are refusal ceilings. Browser quota and available memory may require smaller files. Physical mobile testing has not been performed for this preview.