AMR to AC3 converter
A free AMR to AC3 converter for Adaptive Multi-Rate files. Browser-based pairs here usually run in this tab, with no file upload.
Drop your AMR files here
or browse your device · paste with Ctrl+V
Accepts .amr, .3ga files. You can queue several files; each is processed one after another on your own device.
Your files never leave this device — there is no upload and no server to delete them from.
- 01
Add your AMR files
Drop them onto the box above or click to browse. They are read straight from disk — nothing is sent anywhere.
- 02
Check the settings
AC3 is already selected. Open the gear icon on any row if you want to change quality, dimensions or codec before converting.
- 03
Download your AC3
Press convert and wait for the row to finish. Convert several files and you can take them all as a single ZIP.
AMR
Adaptive Multi-RateThe speech codec used by GSM phone calls and old voice recorders — tiny files, telephone-grade quality, useless for music. Decoding is built in; encoding needs the worker.
- Developed by
- 3GPP
- Released
- 1999
- Extension
- .amr, .3ga
- MIME type
- audio/amr
- Compression
- Lossy
AC3
Dolby DigitalThe 5.1 surround standard for DVD, Blu-ray and broadcast television. Convert it to stereo AAC or MP3 when you need it to play on headphones and phones.
- Developed by
- Dolby Laboratories
- Released
- 1991
- Extension
- .ac3
- MIME type
- audio/ac3
- Compression
- Lossy
- Both AMR and AC3 are lossy formats, so repeated conversions can accumulate rounding artifacts. Keep this to only what you need and avoid repeated round-trips.
Questions about converting AMR to AC3
Is this AMR to AC3 converter free?
Yes. Converting AMR to AC3 here is free, with no account, no watermark and no daily quota. The work runs on your own device, so there is no server cost to pass on to you.
Is my AMR file uploaded anywhere?
For browser-based pairs, your file is read locally and converted by ffmpeg in this tab. No file payload is uploaded; you may still see analytics and engine downloads in network logs.
Is there a file-size limit for AMR to AC3?
There is no imposed upload cap when it runs in-browser, but each conversion still depends on your device and browser memory. Large videos are the first practical limit, then memory-heavy documents or images.
Does converting AMR to AC3 lose quality?
AC3 is a lossy format, so some detail is discarded when it is encoded. At the default quality setting the change is often not visually obvious; keep your original AMR file if you might need it again.
Can I convert several AMR files to AC3 at once?
Yes. Drop in several files and each gets its own row; they are processed one after another on your device. You can download them one by one or as one ZIP.
Does AMR to AC3 work on a phone, Mac or Chromebook?
Most modern browsers on Windows, macOS, Linux, ChromeOS, Android and iOS work. Very large videos are often more reliable on desktop or a browser with more memory.
Why do some conversions take longer on first run?
The conversion engine has to download first. Small codec bundles are fast, while ffmpeg is commonly 12–30 MB; later conversions of similar type use the cached engine.
I converted a file and the output is blank or unusable. What should I check?
Start over with default settings, then change one option at a time (quality, bitrate, page size, or codec) to isolate what changed behavior. If it keeps failing, retry with a smaller file and confirm the source format matches the pair.
Convert other formats to AC3
41 formats can become AC3 here.
Convert AMR to other formats
A AMR file can become any of these.