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Convert JPEG 2000 to QOI

Source · JPEG 2000
Target · QOI

Drop a JPEG 2000 file here

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  • Pixel conversion only. Original EXIF, GPS, XMP and ICC profiles are not copied; processing uses 8-bit display pixels.

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  • No upload
  • Private by design

What happens when you convert JPEG 2000 to QOI?

Lossless sample storage

QOI preserves 8-bit RGB/RGBA samples losslessly. Reducing 16-bit data or discarding profiles and metadata before encoding is outside that guarantee. QOI can store its supported image samples without lossy compression. This applies after rendering and sample conversion: it does not guarantee preservation of source precision, colour space or document structure, and cannot undo earlier losses.

8-bit destination samples

Pixel conversion only. Original EXIF, GPS, XMP and ICC profiles are not copied; processing uses 8-bit display pixels.

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 →
QOI

Target

QOI

Quite OK Image Format

Compression: LosslessTransparency: YesMetadata: Colour-space flag

A small lossless codec for 8-bit RGB and RGBA images, designed for simple, fast implementations.

Explore QOI format →

Is JPEG 2000 → QOI right for you?

Good choice when

  • QOI fits your delivery use: Application assets & simple decoding.
  • You need a transparency-capable destination and will check its supported variant.
  • You need lossless storage of the rendered samples supported by QOI.
  • 8-bit colour is sufficient for your destination.

Probably not when

  • You assume format-level alpha support guarantees matching transparent edges.
  • You expect lossless encoding to restore lost details or editing structure.
  • You need higher-precision samples for grading or measurement.
  • You require identical samples without a defined colour and precision policy.

JPEG 2000 to QOI conversion details

Transparency representation
The implemented target supports alpha. Display-pixel processing can round translucent samples; archival sample equality is not promised.
Lossless sample storage
QOI preserves 8-bit RGB/RGBA samples losslessly. Reducing 16-bit data or discarding profiles and metadata before encoding is outside that guarantee. QOI can store its supported image samples without lossy compression. This applies after rendering and sample conversion: it does not guarantee preservation of source precision, colour space or document structure, and cannot undo earlier losses.
8-bit destination samples
Pixel conversion only. Original EXIF, GPS, XMP and ICC profiles are not copied; processing uses 8-bit display pixels.
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 → QOI: Lossless 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. QOI: QOI preserves 8-bit RGB/RGBA samples losslessly. Reducing 16-bit data or discarding profiles and metadata before encoding is outside that guarantee.
Transparency
Transparency is replaced with white by default. Change the background in Advanced options.
Colour depth
JPEG 2000: Component-defined precision → QOI: 8 bits/sample
Dimensions
Rendered image dimensions are retained within the converter limits; this tool does not offer resizing. Orientation handling depends on the source decoder.
Metadata
Pixel conversion only. Original EXIF, GPS, XMP and ICC profiles are not copied; processing uses 8-bit display pixels.

Common questions

Does lossless output mean an unchanged source?

QOI preserves 8-bit RGB/RGBA samples losslessly. Reducing 16-bit data or discarding profiles and metadata before encoding is outside that guarantee. QOI can store its supported image samples without lossy compression. This applies after rendering and sample conversion: it does not guarantee preservation of source precision, colour space or document structure, and cannot undo earlier losses.

Can this output keep higher-than-8-bit samples?

Pixel conversion only. Original EXIF, GPS, XMP and ICC profiles are not copied; processing uses 8-bit display pixels.

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.

Explore related JPEG 2000 and QOI conversions.

Other targets for JPEG 2000

JPEG 2000→JPEG
JPEG 2000 → JPEG
JPEG 2000→JPEG XL
JPEG 2000 → JPEG XL
JPEG 2000→TIFF
JPEG 2000 → TIFF

Other sources for QOI

PNG→QOI
PNG → QOI
BMP→QOI
BMP → QOI
TGA→QOI
TGA → QOI