AMR to ADPCM - Online Audio Converter

Convert AMR to ADPCM online. Private, client-side - no uploadrequired. Batch conversion, quality presets, codec control.

Convert AMR to ADPCM

[+] Drop AMR audio here or click to select AMR

Output format

ADPCM (ADPCM)

Mode[i]

Simple Advanced

Quality[i]

Sample Rate[i]

Channels[i]

About AMR to ADPCM

Convert AMR to ADPCM. AMR encodes narrowband speech for GSM calls at 12.2 kbps and below. ADPCM predicts samples to quarter voice-band bitrates. Variants differ by vendor, so confirm the flavor before converting..

Why convert AMR to ADPCM?

Smaller files with ADPCM lossy compression.
Keep quality where supported.
Private, no upload - runs in your browser.

AMR vs ADPCM

Codec	AMR-NB	ADPCM
Compression	lossy	lossy
Sample behavior	Quality set by bitrate	Quality set by bitrate
Typical use	AMR encodes narrowband speech for GSM calls at 12.2 kbps and below.	ADPCM predicts samples to quarter voice-band bitrates.

When not to convert AMR to ADPCM

Skip ADPCM for archival masters: lossy compression discards detail, so keep the AMR original.
Keep a master copy: repeated exports stack small losses, so archive AMR before batch ADPCM shares.

Limits

Starting point: AMR - AMR encodes narrowband speech for GSM calls at 12.2 kbps and below. Tuned for voice calls, so music loses detail by design. Variants differ by vendor, so confirm the flavor before converting. Encode ADPCM (ADPCM) from AMR at 256k for music or 128k for speech, starting from the master.

How conversion works

Conversion runs entirely in your browser with FFmpeg WASM. Files never leave your device.

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FAQ

How do I convert AMR to ADPCM?

Drop your AMR file onto this page, choose quality and codec settings, then click Convert. The result downloads as ADPCM instantly. All processing runs in your browser.

What codec is used for ADPCM?

The default codec for ADPCM is ADPCM. You can change audio parameters in Advanced mode.

How do you store my files?

We do not store any processed audio. All conversion happens entirely in your browser using FFmpeg WASM.