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jPDFOptimizer is a Java library to optimize and reduce the size of PDF documents. jPDFOptimizer can remove unnecessary objects in PDF documents, detect and merge duplicate images and fonts, and modify image resolution, compression and color spaces to reduce size. The library provides a powerful, yet simple API to let the calling application fine tune how to optimize documents. jPDFOptimizer is built on Qoppa Softwares extensive PDF technology and requires no third party software or drivers. The library is 100% Java and can run on any operating system for which there is a standard Java implementation, such as Windows, Linux, Unix, Solaris and others. Main Features Modify image resolution, compression and color spaces Compress images using JPEG, JPEG 2000 and JBIG2 Compress data streams Remove unused objects Remove and merge duplicate images and fonts Flexible optimization options Linearize PDFs for fast web view Support for PDF 1.7 (latest PDF format) Tested on JDK 1.4.2 and above Works on Windows, Linux, Unix, Mac OS X (100% Java) No third party software or drivers necessary