Download and install the latest version of Filestar.
Right click on one or more Ost file(s) on your desktop and select Convert with Filestar.
Type convert to epub in the search box.
Press Convert.
Or let an AI agent do it: filestarcli -i file.ost -c "convert to epub" (how).
Documents - File Explorer─☐✕
This PC › Documents
Home
Desktop
Downloads
Documents
Pictures
Music
.ostContract.ost
.xlsxBudget.xlsx
.pdfReport.pdf
.pngLogo.png
Filestar*Help✕
Drop files here to get started
ConvertMergeCompressExtractMoveZip
Let your AI agent convert OST to EPUB
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 OST files in my Downloads folder to EPUB”
Or run it yourself:
filestarcli -i file.ost -c "convert to epub"
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 OST to EPUB?
Yes. Install the Filestar CLI with npm install -g filestar and your agent can run filestarcli -i file.ost -c "convert to epub" on your computer, so your files stay on it.
n OST file is a data file created by Microsoft Outlook (2005 or later), an email client and personal information manager. It is used to store a copy of mailbox information from an Office 365, Exchange, or Outlook.com account. OST files may contain email messages, contacts, tasks, calendar data, and other account information.
An EPUB file is a digital ebook saved in the EPUB format, an open XML-based format for digital books and publications. It provides a standard digital publication format for publishers and consumers. EPUB files can be viewed with supporting software programs and hardware devices, such as the Sony Reader and Barnes & Noble Nook.
