GSM to PCM - Online Audio Converter

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

Convert GSM to PCM

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

Output format

PCM (PCM 16-bit)

Mode[i]

Simple Advanced

Quality[i]

Sample Rate[i]

Channels[i]

About GSM to PCM

Convert GSM to PCM. GSM 06.10 encodes European mobile speech at 13 kbps. PCM is raw pulse-code samples with no container or headers. Sample rate and width must be set by hand since headers carry none..

Why convert GSM to PCM?

Larger files than lossy shares with PCM uncompressed quality.
Keep quality where supported.
Private, no upload - runs in your browser.

GSM vs PCM

Codec	GSM	PCM 16-bit
Compression	lossy	uncompressed
Sample behavior	Quality set by bitrate	Full quality kept
Typical use	GSM 06.10 encodes European mobile speech at 13 kbps.	PCM is raw pulse-code samples with no container or headers.

When not to convert GSM to PCM

Skip PCM for the smallest share: lossless output stays large, so prefer a lossy target when sending GSM files.
Keep a master copy: repeated exports stack small losses, so archive GSM before batch PCM shares.

Limits

Starting point: GSM - GSM 06.10 encodes European mobile speech at 13 kbps. Carrier framing can offset timing; verify duration. Sample rate and width must be set by hand since headers carry none. Encode PCM (PCM 16-bit) from GSM 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 GSM to PCM?

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

What codec is used for PCM?

The default codec for PCM is PCM 16-bit. 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.