Convert spx to vtt

Download and install the latest version of Filestar.
Right click on one or more Spx file(s) on your desktop and select Convert with Filestar.
Type convert to vtt in the search box.
Press Convert.
Or let an AI agent do it: filestarcli -i file.spx -c "convert to vtt" (how).

Let your AI agent convert SPX to VTT

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 SPX files in my Downloads folder to VTT”

Or run it yourself:

filestarcli -i file.spx -c "convert to vtt"

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 SPX to VTT?

Yes. Install the Filestar CLI with npm install -g filestar and your agent can run filestarcli -i file.spx -c "convert to vtt" on your computer, so your files stay on it.

Using Filestar With AI Agents →

What is the difference between .spx and .vtt?

Name: Ogg Vorbis Speex File; WebVTT
Extension: .spx; .vtt
Format: Binary; Text
Category: Audio; Subtitles
Developer: Xiph.Org; W3C
Description: Audio file compressed using Speex compression and saved in the Ogg Vorbis container format; designed as an audio compression format specifically for speech; compresses voice at 2 to 44 kbps and supports 8 kHz, 16 kHz, and 32 kHz compression in the same bitstream.; WebVTT (Web Video Text Tracks) is a text file format that is used to store subtitles and captions for online video content. It is supported by many web browsers and can be used to add captions and subtitles to HTML5 videos.
MIME Type: audio/ogg; text/vtt
Sample: sample.vtt
Wikipedia: .spx on Wikipedia; .vtt on Wikipedia

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