How do I convert a PST file to ICO using LetsConvert?

Upload your PST file, select the embedded image or attachment you'd like to use, choose ICO output size (from 16x16 to 256x256), and click Convert. Batch mode lets you select multiple images for simultaneous conversion. Finally, download your ICO file.

Why convert from PST to ICO? What's the difference?

PST is a Microsoft Outlook mailbox file that stores emails, contacts, and attachments, while ICO is a bitmap-based icon format with built-in support for multiple resolutions and alpha transparency. Converting extracts a single image from the PST container and repackages it as a favicon or desktop icon, reducing file size and ensuring compatibility with Windows, browsers, and app launchers.

How does the converter handle transparency and resolution from PST to ICO?

The converter parses the PST structure and copies the original bitmap data without recompression. If the source image has an alpha channel, it is preserved in the ICO. For multi-size ICO, we generate separate 16, 24, 32, 48, and 256-pixel versions from the original, maintaining pixel ratio and color profile. No dithering or lossy compression is applied.

PST-TO-ICO

Extract embedded images from PST and convert to ICO with full alpha transparency and multi-size output. Preserve resolution for crisp, compatible icons.

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🖼️PSTsource

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✨ICOtarget

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Choose PST files or drag & drop

Batch upload supported · Max 50MB per file

Browse Files

Or import from:

Conversion Settings

Output Quality90%

Optional Dimensions

Max Width (px)

Max Height (px)

🛡️ Zero Data Storage Guarantee

Images are converted directly in isolated memory sessions and destroyed immediately upon download.

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PST

PST File Format

Source Format

PST is a standardized digital file format supported by LetsConvert. Convert PST files securely, privately, and instantly online with zero software installation, bank-grade encryption, and automatic 60-minute file purging.

Category: Data & Media File

MIME Type: application/pst

Developer: Standard Organization

Best For: Converting and managing PST files across devices and applications.

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ICO

Windows Icon Format

Target Output

ICO is an image file format specifically designed to store multi-resolution icon graphics for Microsoft Windows operating systems and website favicons.

Category: Icon Graphics

MIME Type: image/x-icon

Developer: Microsoft

Best For: Website favicons, desktop shortcut icons, and application branding.

💡 Technical Guide & Conversion Insights

Why Convert PST to ICO?

Converting from PST (PST File Format) to ICO (Windows Icon Format) is essential when you need enhanced compatibility, reduced file size, or specific feature support. While PST is ideal for Converting and managing PST files across devices and applications., ICO offers superior advantages for Website favicons, desktop shortcut icons, and application branding.. Our secure online conversion engine ensures that all your PST file attributes, geometry, quality, and metadata are seamlessly preserved during the transformation into ICO.

● PST Key Advantages:

✓Standard format compatibility
✓Fast online conversion processing
✓Zero software install required

● ICO Key Advantages:

★Contains multiple icon resolutions (16x16, 32x32, 48x48, 256x256) inside a single file
★Universal website favicon standard

PST vs ICO Comparison Table

Detailed technical differences and capabilities between PST File Format and Windows Icon Format.

Feature / Attribute	PST	ICO
Primary Format Name	PST File Format	Windows Icon Format
Primary File Category	Data & Media File	Icon Graphics
Standard MIME Type	application/pst	image/x-icon
Core Developer / Standard	Standard Organization	Microsoft
Optimal Use Case	Converting and managing PST files across devices and applications.	Website favicons, desktop shortcut icons, and application branding.

❓ Common Questions

Frequently Asked Questions (PST to ICO)

Everything you need to know about converting PST to ICO with LetsConvert.

To convert your PST file to ICO, upload your file by dragging and dropping it into the upload box or selecting it from your device. Adjust any optional quality or dimension settings, then click 'Convert'. Your converted ICO file will be ready for instant high-speed download within seconds.

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100% Secure & Automatic File Purging

Your PST files are encrypted with 256-bit SSL and permanently deleted from our servers within 60 minutes.

● Zero File Storage

How to Convert PST-TO-ICO

Select or drop your Pst file.

Initiate the ICO conversion process.

Download your converted ICO file.

⚡ Related Conversions

PST-TO-ICO

Conversion Settings

🛡️ Zero Data Storage Guarantee

PST

ICO

Why Convert PST to ICO?

● PST Key Advantages:

● ICO Key Advantages:

PST vs ICO Comparison Table

Frequently Asked Questions (PST to ICO)

100% Secure & Automatic File Purging

How to Convert PST-TO-ICO

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