Tools / File Converter / GSM to CAF Converter

GSM to CAF Converter

Convert GSM files to CAF. Free, without uploading.

This tool converts GSM files to CAF. GSM phone audio.

Apple Core Audio. CAF is lossless, so the audio keeps the quality it has in the GSM file.

Conversion runs on your device; your file is never sent to a server. The components download once on first use, and later conversions start right away.

How to use

1. Choose the GSM file, drag it in, or paste its link.
2. Choose the audio quality; optionally enter a start and end time.
3. Press "Convert" and download the CAF file.

Frequently asked questions

Will audio quality drop when converting to CAF?

No. CAF is lossless.

Is there a file size limit?

No fixed limit; your device’s memory decides. Computers usually handle files up to 1–2 GB.

Is my file uploaded?

No. Your GSM file is converted to CAF inside your browser.