AMR to APK Converter
Processing entirely on your device — large files may take a moment.
Adaptive Multi-Rate Audio and Android Package exist for different jobs: AMR is the tiny voice-recording format of old Nokia-era phones and answering machines. Repack an APK as ZIP to inspect its manifest and assets (not for reinstalling).
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 APK
| AMR | APK | |
|---|---|---|
| Compression | Lossy speech codec | DEFLATE / stored |
| Best for | Voice memos and call recordings | App inspection |
How to convert AMR to APK
- 1
Select your files
Select your AMR file — it never leaves your device.
- 2
Convert instantly
The engine packs the file, byte for byte, into a APK container — no re-encoding, no quality change.
- 3
Download results
Download the finished APK 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 APK format
An APK is Android’s install package: a ZIP holding AndroidManifest.xml, compiled DEX bytecode, native libraries and assets. Unpacking one is the standard first step of security review, compatibility checks and asset recovery.
One honest limit: unpacking is inspection, not installation — a repacked ZIP cannot be installed back onto a phone, and the page says so.
+Strengths
- ✓Everything an Android app ships
- ✓ZIP-based, easy to unpack
- ✓Manifest readable as XML
!Limitations
- −DEX bytecode is not human source
- −Repack cannot reinstall
Why convert AMR to APK?
Converting makes sense where the strengths of APK meet what AMR cannot give you. Everything an Android app ships Meanwhile Voice-only: music quality is unusable One pass through the converter above puts your file on the right side of that trade-off.
Frequently asked questions
Is this AMR to APK 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 APK?
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.
Will converting AMR to APK reduce audio quality?
If APK is lossless, the output contains everything the AMR file contains — no further loss is added. If APK 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.
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.