Download and install the latest version of Filestar.
Right click on one or more Gsm file(s) on your desktop and select Convert with Filestar.
Type convert to hcom in the search box.
Press Convert.
Or let an AI agent do it: filestarcli -i file.gsm -c "convert to hcom" (how).
Documents - File Explorer─☐✕
This PC › Documents
Home
Desktop
Downloads
Documents
Pictures
Music
.gsmContract.gsm
.xlsxBudget.xlsx
.pdfReport.pdf
.pngLogo.png
Filestar*Help✕
Drop files here to get started
ConvertMergeCompressExtractMoveZip
Let your AI agent convert GSM to HCOM
Claude Code, Codex, Cursor and other agents can do this on your computer with Filestar. Your files stay on your machine.
Install Filestar and add it to your agents:
npm install -g filestar
filestarcli agent install
Then ask your agent:
“Convert the GSM files in my Downloads folder to HCOM”
Or run it yourself:
filestarcli -i file.gsm -c "convert to hcom"
Runs on your computer, so your files stay on it. Works on Windows, macOS and Linux. 50 free conversions with the npm install, no account needed.
Can my AI agent convert GSM to HCOM?
Yes. Install the Filestar CLI with npm install -g filestar and your agent can run filestarcli -i file.gsm -c "convert to hcom" on your computer, so your files stay on it.
European Telecommunications Standards Institute (ETSI)
Nero AG
Description
A lossy file format used to compress speech in Global Standard for Mobile (GSM) telecommunications. It is very effective for reducing audio file size. However, encoding and decoding audio signals severally is discouraged as the final product will have a lot of noise. Popular with some voice mail software but it is CPU intensive.
Macintosh HCOM files. These are Mac FSSD files with Huffman compression.