Use this AMR to WAV converter to prepare a voice recording for an editor, player, or recipient that needs PCM WAV. Upload one .amr file, start conversion, and download the WAV when it finishes. The tool is free, with no account or software installation required.
The output is uncompressed 16-bit PCM WAV. It can make the recording usable in a different workflow, but it cannot restore sound detail already discarded by AMR compression.
What changes between AMR and WAV?
AMR is a speech codec. Its compressed representation is decoded and saved as PCM samples in the WAV. The result is still the same recorded speech, with the limitations of the source.
| Property | AMR input | This tool's WAV output |
|---|---|---|
| Extension | .amr | .wav |
| Audio representation | Compressed speech | Signed 16-bit little-endian PCM (pcm_s16le) |
| Compression | Lossy | Uncompressed PCM |
| Sample rate | AMR-NB uses 8kHz; AMR-WB is a different codec | An 8kHz source can remain 8kHz in WAV |
| Page preview | File information; input playback is not required | WAV playback when supported, plus download |
| Sound quality | Limited by the original recording and encoding | Does not recover discarded detail |
The AMR specification distinguishes narrowband AMR at 8kHz from AMR-WB at 16kHz. This page accepts .amr files; it does not promise every AMR variant or add .awb and .3gp to the upload list. A file's actual audio must be readable by the service.
When converting an AMR recording to WAV helps
Open a recording in an audio editor
An older phone or recording application may have saved speech as AMR, while your editor requests WAV. Convert a copy, import it, and check the beginning, end, and duration. If the editor already handles the source correctly, an extra conversion may be unnecessary.
Prepare audio for annotation or review
A PCM WAV can be a practical input for a separate application used to mark passages, add notes, or review a recording. This converter only changes the audio format. It does not transcribe speech, identify speakers, remove background noise, or reconstruct missing words.
Deliver a compatible listening copy
If the recipient accepts WAV but cannot open AMR, a converted copy may solve the file-format problem. Confirm sample-rate and channel requirements as well as the extension. A WAV file is not automatically 44.1kHz, 48kHz, or stereo.
How to convert AMR to WAV online
- Upload one AMR file. Select or drag in a complete
.amrup to 200MB and 30 minutes. The upload area shows file information; the browser does not need to play the AMR first. - Start conversion. Wait for the upload to finish and start the task. WAV is already selected. The service checks the audio and duration and creates a 16-bit PCM result.
- Listen and download. Preview the WAV if your browser supports it, then download it and open it in the intended editor or player.
Each task processes one file. Batch upload, webpage addresses, cloud sharing links, and automatic splitting of long recordings are not available. Export the actual audio file from the recording application and wait until its export or download has finished.
Does a WAV restore the original voice quality?
No. Decoding AMR does not recover information discarded during lossy speech encoding. The WAV stores decoded sound as 16-bit PCM; it does not automatically remove noise or echo, repair clipping, or fill in missing speech.
An AMR-NB recording may produce an 8kHz WAV, which is not a sign that the conversion failed. Sample rate describes how often the audio is sampled, not how clear every word will sound. A larger PCM file does not restore the frequency range or detail absent from the source.
The output is fixed to signed 16-bit little-endian PCM. This page has no 24-bit, floating-point, sample-rate, channel, or audio-enhancement settings. If a recipient requires a different technical specification, check that requirement before using this conversion.
Listen at a similar volume and check spoken words, pauses, the start and end of the recording, and the channel arrangement. Keep the best original available for later work. Similar playback or matching duration alone does not prove that two decoding environments will produce numerically identical samples.
Why the WAV is usually much larger
AMR compresses speech, while this WAV stores PCM without compression. More bytes therefore do not mean that additional speech detail was recovered. The size increase depends on duration, sample rate, channels, and the source's actual average bitrate.
For ten minutes of 8kHz mono, 16-bit PCM, each sample occupies 2 bytes. The audio data size is 8000 × 1 × 2 × 600 = 9,600,000 bytes, or about 9.60MB in decimal units. An AMR payload averaging 12.2kbps for the same duration would contain about 0.915MB, calculated as 12.2 × 600 ÷ 8000.
These are decimal-MB calculations, excluding file headers and AMR framing. They are not measured results, a fixed expansion ratio, or selectable parameters. Actual average bitrate depends on the AMR coding mode; when discontinuous transmission (DTX) is enabled during encoding, silence or pauses may also lower the average bitrate. Headers also contribute to total file size.
The 200MB limit applies to the source file you upload, and 30 minutes is a separate duration limit. After conversion, check that the WAV file meets the recipient's file-size requirements.
If an AMR file will not convert or sounds wrong
Seeing file information without an input player is expected. Missing browser playback does not by itself mean that the AMR is damaged. The service still needs complete, decodable audio within the size and duration limits.
If conversion fails, open the source in the application that created it, check that the recording is complete, and export the actual audio file again if possible. Changing an .awb or .3gp extension to .amr does not change its contents or guarantee that it meets this page's upload and decoding requirements.
If the WAV downloads but sounds different in another application, check playback speed, sample-rate interpretation, channel handling, and volume before comparing it with the original. Listen for missing sections and unexpected silence. The converter does not repair corrupted recordings or guarantee compatibility with every editor.
Frequently asked questions
Is this AMR to WAV converter free?
Yes. No account or credits are required. Each task handles one AMR file up to 200MB and 30 minutes. Batch upload and automatic splitting of longer recordings are not available.
Can I convert AMR without a browser preview?
Yes. The page shows file information and does not require the browser to play the AMR. Conversion still depends on readable, supported audio within the size and duration limits. You can preview the completed WAV if your browser supports it.
Is an 8kHz WAV output a problem?
Not necessarily. AMR-NB uses an 8kHz sample rate, and WAV can store that decoded audio at 8kHz. The extension does not require 44.1kHz or 48kHz. Check the recipient's specification; this page does not offer manual resampling.
Will conversion make the voice clearer or remove noise?
No enhancement is applied. The tool decodes AMR and saves 16-bit PCM WAV, but cannot restore discarded detail, remove noise or echo, repair clipping, or recover missing speech. Use the best available original for further work.
Does it accept every AMR, AMR-WB, AWB, or 3GP file?
The upload extension is .amr, and universal compatibility is not guaranteed. .awb and .3gp are not accepted extensions on this page. Renaming a file does not alter its contents or guarantee that the service can decode the audio.
Can I choose 24-bit, stereo, or a different sample rate?
No. Output is fixed to signed 16-bit little-endian PCM WAV (pcm_s16le), without bit-depth, channel, or sample-rate controls. Converting a mono voice recording does not create a new stereo recording.
Why is the WAV much bigger when it sounds the same?
It stores uncompressed PCM instead of AMR-compressed speech. Size depends on duration, sample rate, channels, and source bitrate; there is no fixed multiplier. A larger result does not mean that the original recording's missing detail was restored.