GSM to MKA - Online Audio Converter

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

Convert GSM to MKA

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

Output format

MKA (Matroska)

Mode[i]

Simple Advanced

Quality[i]

Sample Rate[i]

Channels[i]

About GSM to MKA

Convert GSM to MKA. GSM 06.10 encodes European mobile speech at 13 kbps. MKA is the Matroska audio-only container for tracks and chapters. Only selected tracks carry over, so pick language first..

Why convert GSM to MKA?

Flexible size with MKA lossless or lossy compression - lossy for smaller files, lossless for exact quality.
Keep quality where supported.
Private, no upload - runs in your browser.

GSM vs MKA

Codec	GSM	Matroska
Compression	lossy	lossless or lossy
Sample behavior	Quality set by bitrate	Depends on the track inside
Typical use	GSM 06.10 encodes European mobile speech at 13 kbps.	MKA is the Matroska audio-only container for tracks and chapters.

When not to convert GSM to MKA

Skip MKA 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 MKA shares.

Limits

Starting point: GSM - GSM 06.10 encodes European mobile speech at 13 kbps. Carrier framing can offset timing; verify duration. Only selected tracks carry over, so pick language first. Encode MKA (Matroska) 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 MKA?

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

What codec is used for MKA?

The default codec for MKA is Matroska. 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.