Convert htk to opml

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

Let your AI agent convert HTK to OPML

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

Or add it in one click:

Claude Code:

claude mcp add filestar -- npx -y [email protected] mcp

Then ask your agent:

“Convert the HTK files in my Downloads folder to OPML”

Or run it yourself:

filestarcli -i file.htk -c "convert to opml"

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 HTK to OPML?

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

Using Filestar With AI Agents → · Download SKILL.md

What is the difference between .htk and .opml?

Name: Hidden Markov Model Toolkit File; OPML Outline
Extension: .htk; .opml
Format: Binary; Text
Category: Audio; Document
Developer: Cambridge University's Speech Group.; Dave Winer
Description: Single channel 16-bit PCM format used by HTK, a toolkit for building Hidden Markov Model speech processing tools.; OPML (Outline Processor Markup Language) is an XML-based format used to exchange outline-structured information. It is most commonly used to share lists of web feed subscriptions (such as RSS or Atom feeds) between feed readers and aggregators.
MIME Type: application/x-htk; text/x-opml
Sample: sample.htk; sample.opml
Wikipedia: .htk on Wikipedia; .opml on Wikipedia

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