GSM to WMA Pro - Online Audio Converter

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

Convert GSM to WMA Pro

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

Output format

WMA Pro (WMA Pro)

Mode[i]

Simple Advanced

Quality[i]

Sample Rate[i]

Channels[i]

About GSM to WMA Pro

Convert GSM to WMA Pro. GSM 06.10 encodes European mobile speech at 13 kbps. WMA Pro adds multichannel surround and higher resolutions to WMA. Surround mixes fold down to stereo on most converters..

Why convert GSM to WMA Pro?

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

GSM vs WMA Pro

Codec	GSM	WMA Pro
Compression	lossy	lossy
Sample behavior	Quality set by bitrate	Quality set by bitrate
Typical use	GSM 06.10 encodes European mobile speech at 13 kbps.	WMA Pro adds multichannel surround and higher resolutions to WMA.

When not to convert GSM to WMA Pro

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

Limits

Starting point: GSM - GSM 06.10 encodes European mobile speech at 13 kbps. Carrier framing can offset timing; verify duration. Surround mixes fold down to stereo on most converters. Encode WMA Pro (WMA Pro) 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 WMA Pro?

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

What codec is used for WMA Pro?

The default codec for WMA Pro is WMA Pro. 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.