Download and install the latest version of Filestar.
Right click on one or more Vtt file(s) on your desktop and select Convert with Filestar.
Type convert to ass in the search box.
Press Convert.
Or let an AI agent do it: filestarcli -i file.vtt -c "convert to ass" (how).
Documents - File Explorer─☐✕
This PC › Documents
Home
Desktop
Downloads
Documents
Pictures
Music
.vttContract.vtt
.xlsxBudget.xlsx
.pdfReport.pdf
.pngLogo.png
Filestar*Help✕
Drop files here to get started
ConvertMergeCompressExtractMoveZip
Let your AI agent convert VTT to ASS
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 VTT files in my Downloads folder to ASS”
Or run it yourself:
filestarcli -i file.vtt -c "convert to ass"
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 VTT to ASS?
Yes. Install the Filestar CLI with npm install -g filestar and your agent can run filestarcli -i file.vtt -c "convert to ass" on your computer, so your files stay on it.
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.
SubStation Alpha (ASS) is a text-based file format used for subtitle files. It is mostly used for anime, but can be used for any type of video. It is a plain-text format and can be opened with any text editor, such as Notepad. It allows for the creation of more complex subtitles than plain text, such as color-coding, formatting, and timing.
