AMR to WV Converter
Processing entirely on your device — large files may take a moment.
Adaptive Multi-Rate Audio and WavPack exist for different jobs: AMR is the tiny voice-recording format of old Nokia-era phones and answering machines. Convert WV albums to FLAC for maximum compatibility.
Because the whole conversion happens on your device, it is instant, unlimited and genuinely private — no accounts, no watermarks, no files on anyone's server. Multiple files are converted in one go.
How AMR compares to WV
| AMR | WV | |
|---|---|---|
| Compatibility | Phone recorders | ffmpeg, WavPack CLI, fb2k |
| Best for | Voice memos and call recordings | Flexible archiving workflows |
How to convert AMR to WV
- 1
Select your files
Drag & drop your AMR files onto the area above, or click to browse. You can add multiple files at once for batch conversion.
- 2
Convert instantly
Click "Convert to WV". The conversion runs entirely inside your browser using WebAssembly — no upload, no queue, no waiting.
- 3
Download results
Download each converted WV file individually, or grab everything at once as a ZIP archive.
About the AMR format
AMR (Adaptive Multi-Rate) is the speech codec of 2G/3G telephony, and the default recording format of countless feature phones and early smartphones. It is optimized exclusively for human voice: narrowband (300–3400 Hz) and wideband (AMR-WB, 50–7000 Hz) modes that make calls sound like calls.
For voice memos it is remarkably compact — a few kilobits per second. For anything musical it is hopeless: cymbals, bass and anything above its band simply do not exist. Convert AMR voice notes to MP3/Opus for archiving and playback anywhere else.
+Strengths
- ✓Extremely compact for speech
- ✓Native phone-recorder format
!Limitations
- −Voice-only: music quality is unusable
- −Narrow bandwidth sounds dated
About the WV format
WavPack's signature trick is the hybrid mode: encode once into a small lossy .wv plus a tiny .wvc correction file — together they are bit-exact lossless, apart the small file plays like a high-quality MP3. It also offers pure lossless and pure lossy modes in the same container.
Full WavPack files decode losslessly through ffmpeg into FLAC or WAV; hybrid correction files are handled by the original encoder only, so a .wvc alone cannot be restored.
+Strengths
- ✓Unique hybrid lossy+correction mode
- ✓Fast decode, open source
- ✓Error-robust streaming modes
!Limitations
- −Ratios slightly behind APE
- −.wvc correction files are orphaned here
- −Hardware support rare
Why convert AMR to WV?
There is a concrete reason this conversion exists: Voice-only: music quality is unusable WV sidesteps that — Unique hybrid lossy+correction mode If that is your situation, the tool above settles it in seconds, entirely on your device.
Frequently asked questions
Is this AMR to WV converter really free?
Yes — completely free, with no sign-up, no watermark and no daily conversion limits. The site is supported by advertising.
Are my files uploaded to a server?
No. The conversion runs entirely inside your browser using WebAssembly, so your files never leave your device — that is what makes it instant and private.
Does it work on Windows, Mac, iPhone and Android?
Yes. Anything with a modern browser works: Windows, macOS, Linux, Android and iOS. No software installation is required.
Is there a file size limit for AMR to WV?
The only limit is your device's memory, since nothing is uploaded. Files up to a few hundred megabytes work fine on a modern desktop browser; very large files simply take a little longer.
Can I convert a whole folder of AMR files?
You can select many files at once and they are processed in a single batch. Output files land in one ZIP download when there is more than one result.
Will converting AMR to WV reduce audio quality?
If WV is lossless, the output contains everything the AMR file contains — no further loss is added. If WV is lossy, one recompression pass is unavoidable; the quality slider controls how much. Loss that already happened in the source file can never be undone by converting.