Convert OST to ICO
Convert OST to ICO instantly in your browser. Free, fast, and private - your files are processed locally on your device.
Drop your OST files here
Up to 50MB per file.
Conversion Settings
Files never leave your browser
How to Convert
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Upload your OST files
Drag and drop or select OST files from your device. You can upload multiple files at once.
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Configure Output
Choose any available ICO output options, then start the conversion.
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Download ICO files
Once conversion finishes, download your files individually or as a compressed ZIP archive.
Why convert OST to ICO?
OST is OST content ready to open, share, and use in compatible software. Converting it to ICO creates a Windows icon container that can store several icon sizes in one file, ready for workflows that use the destination format.
ICO is the native icon format for Windows shortcuts and applications, and opens in many icon and image editors.
Frequently Asked Questions
What does converting OST to ICO do?
It creates a genuine ICO file from your OST. OST is the OST file format, while ICO is a Windows icon container that can store several icon sizes in one file. The result is ready for workflows that use the destination format.
What is retained in the OST to ICO conversion?
Supported content is read from the OST file and written into a genuine ICO file, ready for applications and services that use the destination format.
Which apps can open the converted ICO file?
ICO is the native icon format for Windows shortcuts and applications, and opens in many icon and image editors.
Does OST to ICO run in my browser?
Yes. This OST to ICO conversion runs locally in your browser for fast, private processing on your device.
Can I batch convert OST files to ICO?
Yes. Add multiple OST files, convert them together, and download each ICO result separately or collect the completed batch in a ZIP file.
What is the OST to ICO file size limit?
OST files can currently be up to 50MB.