AMR to FLAC Converter
Convert AMR to FLAC online for free. Fast, secure, and high-quality conversion with no sign-up or software required.
Maximum file size is 1GB
How it works
Three steps to your converted file
Everything happens in your browser tab - upload, pick a format, download. The heavy lifting runs on our servers.
Upload your file
Drag and drop, click to browse, or paste a URL. Batches take up to 20 files at once - 230+ input formats across video, audio, image, document, and archive types.
Choose an output format
Pick from over a hundred output formats. Filter by category or search by name - every option is open to everyone, no account needed.
Convert & download
Hit Convert and grab your download link moments later. Originals are erased when the job completes; results are cleared within about an hour.
What is an AMR file?
The Adaptive Multi-Rate (AMR) audio codec is a compressed audio format optimized for speech coding, standardized by the 3rd Generation Partnership Project (3GPP) in 1999. Utilized heavily in GSM and UMTS mobile telephony, it employs the Algebraic Code-Excited Linear Prediction (ACELP) algorithm to dynamically adjust bitrates based on link quality, supporting eight discrete modes ranging from 4.75 to 12.2 kbit/s. The file structure encapsulates raw speech frames and supports Discontinuous Transmission (DTX), Voice Activity Detection (VAD), and Comfort Noise Generation (CNG) to maximize bandwidth efficiency in cellular networks.
How to open an AMR file
Native playback of AMR files is standard on Android devices and many legacy mobile platforms but is often unsupported on desktop operating systems like Windows and macOS without third-party codecs. Users should utilize the VLC media player, which leverages the FFmpeg library for decoding, or Audacity for editing purposes. Apple users can use QuickTime Player if the specific AMR component is installed, though cross-platform tools like VLC remain the most reliable solution.
AMR Technical Info
- Full Name
- Adaptive Multi-Rate Audio Codec
- Developed By
- 3GPP (3rd Generation Partnership Project)
- Initial Release
- 1999
- MIME Type
- audio/amr
What is a FLAC file?
The Free Lossless Audio Codec (FLAC) is an open-source audio coding format developed by the Xiph.Org Foundation that compresses digital audio without any loss of data (bit-perfect preservation). It employs linear prediction and Rice coding (Golomb-Rice) rather than the perceptual psychoacoustic modeling used in MP3 or AAC. The format structure consists of the 'fLaC' stream marker, metadata blocks (Streaminfo, Vorbis comments for tags, Seekpoints), and audio frames, typically achieving compression ratios of 50-70% compared to raw PCM WAV files.
How to open a FLAC file
FLAC enjoys extensive native support on modern platforms, including Windows 10/11, Android, and macOS (starting with macOS High Sierra). For older systems or advanced playback control, software such as Foobar2000 (Windows) or Vox (macOS) is recommended. The VLC media player is a universal solution for all operating systems, handling FLAC streams and associated metadata seamlessly.
FLAC Technical Info
- Full Name
- Free Lossless Audio Codec
- Developed By
- Josh Coalson / Xiph.Org Foundation
- Initial Release
- 2001
- MIME Type
- audio/flac
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Purpose-built for speed, privacy, and breadth of format support.
Convert AMR to FLAC in seconds
Every AMR to FLAC conversion runs on our servers, so your device stays fast and the output quality stays intact.
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No queue, no waiting. Files are processed on high-performance servers and returned in seconds, even for large files.
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Developer API
Convert AMR to FLAC via API
Automate AMR to FLAC conversions in three steps: create a job, upload your file, then poll for the result.
# 1. Create job
curl -X POST https://api.runconvert.com/v3/jobs \
-H "Authorization: Bearer YOUR_API_KEY" \
-H "Content-Type: application/json" \
-d '{
"tag": "amr-to-flac",
"tasks": {
"upload-file": {
"operation": "import/upload"
},
"convert": {
"operation": "convert",
"input": "upload-file",
"output_format": "flac"
},
"export-result": {
"operation": "export/url",
"input": "convert"
}
}
}'
# 2. Upload your file (use upload_url from the response)
curl -X PUT "$UPLOAD_URL" --upload-file input.amr
# 3. Poll for result
curl https://api.runconvert.com/v3/jobs/$JOB_ID?include=tasks \
-H "Authorization: Bearer YOUR_API_KEY"Replace YOUR_API_KEY with your RunConvert API key. Get your free API key at runconvert.com/api.