Jupiter ICO Converter (Offline, No Cloud)

Convert JPG or PNG images to ICO format. All processing happens locally.

🖼️ Batch ICO Converter

Convert single or multiple images to ICO format instantly. Batch processing with automatic downloads.

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Click to upload or drag & drop

Supports JPG, JPEG, PNG files. Select multiple files for batch conversion with automatic downloads.

Preview

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🔍 ICO File Analyzer

Upload an ICO file to see what sizes are embedded inside.

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Click to upload ICO file or drag & drop

Supports .ico files only

📖 About Jupiter ICO Converter

🔧 How It Works

Jupiter ICO Converter uses modern web technologies to convert your images entirely within your browser:

  • HTML5 Canvas API: Resizes and processes your images
  • FileReader API: Safely reads local image files
  • Blob API: Creates downloadable ICO files
  • Pure JavaScript: No external dependencies or server processing

✨ Key Features

  • Batch Conversion: Convert multiple images simultaneously with automatic downloads
  • Multiple Sizes: Create ICO files with 16×16 to 256×256 sizes
  • High Quality: Advanced image smoothing for crisp results
  • Instant Processing: No waiting for uploads or downloads
  • Format Support: Works with JPG, JPEG, and PNG images
  • Timestamped Downloads: Automatic filename generation with date/time stamps
  • Dark/Light Mode: Choose your preferred interface theme

🛡️ Security & Privacy

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Zero Data Collection

No tracking, analytics, or personal data collection

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Client-Side Only

All processing happens in your browser, never on servers

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No Network Access

Application cannot send data to external servers

📋 Supported Formats

Input Formats
  • JPG/JPEG images (single or batch)
  • PNG images (single or batch)
  • Any size (limited by browser memory)
  • Drag & drop support for multiple files
Output Format
  • ICO files with multiple embedded sizes
  • Standard Windows icon format
  • Compatible with all major applications
  • Automatic timestamped filenames for batch

🌟 Why Choose Jupiter ICO Converter?

  • Free Forever: No costs, subscriptions, or hidden fees
  • No Registration: Start converting immediately
  • Ad-Free: Clean, focused interface without distractions
  • Open Source Principles: Transparent, auditable code
  • Regular Updates: Continuous improvements and security updates