OpenJPEG

Spec sheet

Purpose

OpenJPEG is an open-source JPEG 2000 codec written in C.Read 11 Oct 2026 · openjpeg.org

Free plan

YesRead 24 Sep 2026 · openjpeg.org

License

The two-clause BSD license permits use and modification, including for commercial applications, with copyright retained in source or binary documentation.Read 11 Oct 2026 · openjpeg.org

API access

YesRead 24 Sep 2026 · openjpeg.org

API stability

The project says it strives to provide a stable API/ABI and exposes a limited subset of functions.Read 11 Oct 2026 · github.com

Batch processing

YesRead 24 Sep 2026 · openjpeg.org

Build

The installation documentation points users to build and installation instructions in the source tree.Read 11 Oct 2026 · github.com

Compression

The opj_compress program converts supported image files to JPEG 2000 files.Read 11 Oct 2026 · github.com

Compression modes

bothRead 24 Sep 2026 · openjpeg.org

Input formats

The documented compressor accepts BMP, PGM, PGX, PNG, PNM, PPM, RAW, RAWL, TGA and TIF inputs.Read 11 Oct 2026 · github.com

JPIP

OpenJPIP implements JPEG 2000 Part 9 features including JPIP over HTTP, image indexing and region-of-interest requests.Read 11 Oct 2026 · github.com

Lossy and lossless

The compressor documentation describes compression-ratio and quality-in-dB layers and says the default is one lossless quality layer.Read 11 Oct 2026 · github.com

Maintainer

The project site says the Image and Signal Processing Group at Université de Louvain maintains the library.Read 11 Oct 2026 · openjpeg.org

Output formats

The documented compressor can output J2K, JP2 and J2C formats.Read 11 Oct 2026 · github.com

Project status

The repository README says the repository should be considered unmaintained and that no committer currently feels responsible for regularly reviewing tickets or pull requests.Read 11 Oct 2026 · github.com

Reference software

The project says it is officially recognized by ISO/IEC and ITU-T as JPEG 2000 Reference Software.Read 11 Oct 2026 · openjpeg.org

Release

The project site lists version 2.5.4 as its latest release.Read 11 Oct 2026 · openjpeg.org

Removed components

The repository says openjpwl, openjp3d and openmj2 were removed after release 2.4.0 and their building and working state is unknown.Read 11 Oct 2026 · github.com

Supported formats

BMP,PGM,PGX,PNG,PNM,PPM,RAW,RAWL,TGA,TIF,J2K,JP2,J2C,JPTRead 24 Sep 2026 · openjpeg.org

Plans and prices

Every OpenJPEG plan and price →

Where Specifiction places it

• Image Compression Software#36 of 858.1