Convert JPG to ICO Online

Free and fast JPG to ICO converter optimized for favicons and Windows desktop icons. Works instantly — no signup required.

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Why Convert JPG to ICO?

ICO is the standard format for Windows icons and favicons:

  • Multi-size container: Include several resolutions in one file.
  • Favicon standard: Works across major browsers.
  • Windows compatibility: Native desktop/app icon support.
  • Crisp at small sizes: Optimized for 16–256 px displays.

Note: JPG doesn't have transparency. For transparent icons, start from PNG.

How to Convert JPG to ICO Online

  1. Click Upload JPG and select your image.
  2. Wait for processing and optimization.
  3. Click Download ICO to get your icon.

We generate common icon sizes automatically.

ICO Format Specifications

  • Standard sizes: 16×16, 32×32, 48×48, 64×64, 128×128, 256×256 px
  • Color depth: Up to 32-bit RGBA (alpha)
  • Transparency: Full alpha channel supported
  • Structure: Header + multiple image entries
  • Compression: PNG-compressed entries for 32-bit icons (Vista+)

Supported Limits & Formats

  • Accepted input: JPG/JPEG (image/jpeg)
  • Max file size: up to 16 MB per file
  • Output: ICO (.ico, MIME image/x-icon)

Troubleshooting

  • Jagged edges: Start from a higher-resolution source; sharp edges downscale better.
  • Need transparency: Convert PNG to ICO so alpha is preserved.
  • Favicon not showing: Clear cache and ensure /favicon.ico is at the site root and linked with <link rel="icon" href="/favicon.ico">.
  • Upload fails: Make sure the file is JPG/JPEG and ≤ 16 MB.

What is JPG?

JPG (JPEG) uses lossy compression for small file sizes — ideal for photos and web use, but it does not support transparency.

What is ICO?

ICO is the Windows and favicon icon format that can bundle multiple sizes and color depths into a single file, supporting alpha transparency.

Use Cases: When to Convert JPG to ICO

  • Favicon creation: Generate a single favicon.ico with multiple sizes.
  • Windows apps/shortcuts: Turn logos into desktop/app icons.
  • Brand consistency: Ensure crisp, consistent icons across resolutions.

  • Yes, the converter is completely free with no hidden charges or subscriptions.
  • Common sizes include 16×16, 32×32, 48×48, 64×64, 128×128, and 256×256 pixels.
  • Yes. <code>favicon.ico</code> is widely supported across major browsers.
  • You can upload images up to 16&nbsp;MB per file.
  • Files are processed automatically and not retained longer than necessary for conversion.
  • We optimize for common icon sizes and use PNG-compressed entries for sharp results.
  • Yes. The converter is mobile-friendly and works on iOS and Android browsers.
  • JPG has no transparency. If you need transparent icons, convert PNG to ICO instead.

For transparent icons, start with PNG input. Place /favicon.ico at your site root and reference it with <link rel="icon" href="/favicon.ico">.