Icon packaging
Creates one square icon. The image is fitted inside it without stretching.
Convert JPEG 2000 to ICO
- In your browser
- No upload
- Private by design
What happens when you convert JPEG 2000 to ICO?
Encoding mode
ICO compression depends on the embedded image payload. Multiple sizes are alternatives, not animation frames; transparency handling differs between old masks and alpha-capable images. The output uses the implemented still-image encoder; file size depends on the pixels and format.
JPEG 2000
Source
JPEG 2000
JPEG 2000
Compression: Lossy & losslessTransparency: YesMetadata: JP2 boxes, ICC, XML (extensions)
Wavelet-based image coding with reversible and irreversible modes. JP2 containers add colour information around the codestream.
Explore JPEG 2000 format →ICO
Target
ICO
Windows Icon
Compression: Depends on variantTransparency: YesMetadata: Image dimensions, Colour depth
An icon resource containing several raster sizes and colour depths, with masks or alpha for transparency.
Explore ICO format →Is JPEG 2000 → ICO right for you?
Good choice when
- ICO fits your delivery use: Application icons & favicons.
- You need an icon resource for a compatible application.
- You need a transparency-capable destination and will check its supported variant.
- Your receiving application supports the required ICO variant.
Probably not when
- You need automatic icon design or guaranteed multi-size packaging.
- You assume format-level alpha support guarantees matching transparent edges.
- You need a guaranteed output file size or archival pixel equality. Encoder settings do not guarantee either.
- You require identical samples without a defined colour and precision policy.
JPEG 2000 to ICO conversion details
- Icon packaging
- Creates one square icon. The image is fitted inside it without stretching.
- Transparency representation
- The implemented target supports alpha. Display-pixel processing can round translucent samples; archival sample equality is not promised.
- Encoding mode
- ICO compression depends on the embedded image payload. Multiple sizes are alternatives, not animation frames; transparency handling differs between old masks and alpha-capable images. The output uses the implemented still-image encoder; file size depends on the pixels and format.
- Sample precision & colour
- Pixel conversion only. Original EXIF, GPS, XMP and ICC profiles are not copied; processing uses 8-bit display pixels.
- Metadata & colour
- Pixel conversion only. Original EXIF, GPS, XMP and ICC profiles are not copied; processing uses 8-bit display pixels.
- Compression
- JPEG 2000: Lossy & lossless → ICO: Depends on variant JPEG 2000: JPEG 2000 supports reversible lossless and irreversible lossy coding. A JP2 container, an extended JPX/JPF file and a raw J2K codestream are related but not identical file structures. ICO: ICO compression depends on the embedded image payload. Multiple sizes are alternatives, not animation frames; transparency handling differs between old masks and alpha-capable images.
- Transparency
- Transparency is replaced with white by default. Change the background in Advanced options.
- Colour depth
- JPEG 2000: Component-defined precision
- Multiple images
- ICO: Alternative icon sizes
- Dimensions
- Creates one square icon. The image is fitted inside it without stretching.
- Metadata
- Pixel conversion only. Original EXIF, GPS, XMP and ICC profiles are not copied; processing uses 8-bit display pixels.
Common questions
Will ICO automatically create all icon sizes?
Creates one square icon. The image is fitted inside it without stretching.
Which compression mode will ICO use?
ICO compression depends on the embedded image payload. Multiple sizes are alternatives, not animation frames; transparency handling differs between old masks and alpha-capable images. The output uses the implemented still-image encoder; file size depends on the pixels and format.
Are bit depth and colour values guaranteed to match?
Pixel conversion only. Original EXIF, GPS, XMP and ICC profiles are not copied; processing uses 8-bit display pixels.
Will metadata and colour profiles be retained?
Pixel conversion only. Original EXIF, GPS, XMP and ICC profiles are not copied; processing uses 8-bit display pixels.