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Format hub

ICO file conversions

Browse everything related to ICO in one place, conversions from ICO, conversions into ICO, and the API and workflow paths that support those file flows.

Browse conversions from ICO, convert other file types into ICO, or jump into API and workflow guides for common implementation paths.

About ICO

What is ICO (Icon)?

ICO is a Windows icon file format that can contain multiple resolutions of the same image in a single file. Browsers use ICO files as the classic favicon format.

Context

When to use ICO.

Best for

  • Browser favicons
  • Windows application icons
  • Multi-resolution icon bundles

Strengths

  • favicon and icon support

ICO is part of the image conversion surface in Converterer. These pages are useful when you need to balance compatibility, compression, transparency, quality, or workflow-specific image requirements.

Limitations

Maximum dimension is 256×256; modern favicons increasingly use PNG or SVG instead.

Outbound paths

Convert from ICO.

Inbound paths

Convert to ICO.

Implementation paths

Use the same format hub across product, ops, and no-code.

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