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JP2 ICO
Free online converter

Convert JP2 to ICO

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JP2 to ICO converterFREE
Drop a .JP2 file here
or pick one - we convert it to .ICO and give you the file to download

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Tested on macOS, Windows & Linux
Last verified Oct 2026

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How to convert JP2 to ICO

  1. Add your .JP2 file - drop it in the box above or click to browse.
  2. Convert it to .ICO in a few seconds.
  3. Download your new .ICO file.

What to expect

  • ICO files store small raster images - typically 16 to 256 px square. JP2 files from archives or geospatial sources are often very large, so resizing is mandatory and fine detail will be lost at icon scale.
  • IrfanView cannot open JP2 files without its separate PlugIns pack - install it from irfanview.com alongside the main app.
  • If the source JP2 has an alpha channel, choose 32-bit color depth when exporting to ICO; lower bit depths drop transparency and replace it with a solid color.

Frequently asked questions

Can I create a multi-size ICO from a JP2?
Yes - ImageMagick supports this with the -define icon:auto-resize flag, which packs multiple resolutions such as 256, 48, 32, and 16 px into a single ICO file.
Why won't IrfanView open my JP2 file?
IrfanView needs its PlugIns pack for JPEG 2000 support - download it from irfanview.com and install it alongside the main application.
Does the conversion preserve transparency?
Only if you export at 32-bit color depth; lower settings drop the alpha channel and replace transparent areas with a solid color.
What size should I use when converting to ICO?
Standard icon sizes are 16×16, 32×32, 48×48, and 256×256 px - resize your JP2 to one of these dimensions before or during export.
Learn about the formats: .JP2 · .ICO
Programs that convert JP2: GIMP · XnView · FastPictureViewer Professional · Adobe Photoshop · ACDSee Photo Manager · FastStone Image Viewer · GIMP for Mac · Preview