Download and install the latest version of Filestar.
Right click on one or more 3gp file(s) on your desktop and select Convert with Filestar.
Type convert to sndr in the search box.
Press Convert.
Or let an AI agent do it: filestarcli -i file.3gp -c "convert to sndr" (how).
Downloads - File Explorer─☐✕
This PC › Downloads
Home
Desktop
Downloads
Documents
Pictures
Music
.3gpHoliday.3gp
.movClip.mov
.pdfInvoice.pdf
.exeSetup.exe
Filestar*Help✕
Drop files here to get started
ConvertMergeCompressExtractMoveZip
Let your AI agent convert 3GP to SNDR
Claude Code, Codex, Cursor and other agents can do this with Filestar. This skill runs in Filestar's cloud and needs a paid Filestar plan.
Install Filestar and add it to your agents:
npm install -g filestar
filestarcli agent install
Then ask your agent:
“Convert the 3GP files in my Downloads folder to SNDR”
Or run it yourself:
filestarcli -i file.3gp -c "convert to sndr"
Runs in Filestar's cloud and needs a Filestar plan.
Can my AI agent convert 3GP to SNDR?
Yes, with a paid Filestar plan: this skill runs in Filestar's cloud. Install the Filestar CLI with npm install -g filestar and your agent can run filestarcli -i file.3gp -c "convert to sndr".
A 3GP file is a multimedia file saved in an audio and video container format developed by the 3rd Generation Partnership Project (3GPP). It stores video and audio streams that are transmitted between 3G mobile phones and over the Internet.
The SNDR file extension is used for older 8-bits mono sound format which was used in old Sounder program.