Download PDFlib PLOP & PLOP DS 4.1
All PLOP packages contain combined binaries which cover two products:
PLOP is a versatile tool which can repair, linearize, optimize, encrypt, and decrypt PDF documents.
PLOP DS (Digital Signature) offers all features of PLOP, plus the ability to apply digital signatures to PDF documents. The digital signature feature is only available in PLOP DS, but not in the PLOP base product.
Download PDFlib PLOP & PLOP DS by clicking on the appropriate software package. Both products can be evaluated without a license, but some features are restricted (see documentation) unless a valid license key is applied. A license key can be purchased by clicking 
. The license key will activate PLOP or PLOP DS and will turn the software to an unrestricted version for commercial use.
English PLOP & PLOP DS documentation is included in each of the packages. Technical documentation in languages different from English can be found below the download table.
PDFlib PLOP and PLOP DS packages contain:
the command-line program
the library for the languages noted
the documentation
examples for all supported languages
PDFlib PLOP / PDFlib PLOP DS 4.1
Platforms | Package for use with | Purchase | Purchase |
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Windows Server 2003/2008 |
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Windows Server 2003/2008 (64-bit) |
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Mac OS X 10.5 (Universal) |
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Mac OS X 10.6, 10.7 (Universal) |
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Linux on IA-32 (for Intel x86) |
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Linux on Intel 64 |
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Sun/IBM/HP – see system requirements | |||
Sun Solaris on sparc |
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Sun Solaris on sparc (64-bit) |
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Sun Solaris on IA-32 |
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Sun Solaris (for AMD64) |
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IBM AIX 5/6/7 |
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IBM AIX 5/6/7 (64-bit) |
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HP-UX 11 on PA-RISC (IPL32) |
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HP-UX 11 on PA-RISC 2 (LP64) |
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HP-UX 11 on IA-64 (ILP32) |
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HP-UX 11 on IA-64 (LP64) |
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IBM i5/iSeries and zSeries – see system requirements | |||
zSeries (S/390) with OS/390 or USS |
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zSeries (S/390) with MVS |
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Please note that the AS/400 packages are only for PLOP but not for PLOP DS: | |||
i5/iSeries (AS/400) |
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Windows – see 
Mac – see 
Linux – see 
* The AIX binding can be used for PHP on iSeries/i5. Please see here.
In general, we support PHP 5.2 and 5.3.
See our PDFlib in PHP HowTo document for more info about PHP and PLOP.
For .NET please see our document PDFlib in .NET HowTo.
In general, Perl 5.8, 5.10, 5.12 is supported.
In general, Python 2.5, 2.6, 3.0, 3.1 and 3.2 is supported.
If you want to check that your download was free of transmission errors, we provide md5 checksums for all download packages.
PDFlib PLOP & PLOP DS Reference Manual
The PDFlib PLOP & PLOP DS Reference Manual provides a thorough introduction to programming with PDFlib PLOP and the complete PLOP-API. It is a must-read for all PLOP developers.
PDFlib PLOP & PLOP DS | ||
| The English edition of the PDFlib PLOP & PLOP DS Reference Manual is included in all PLOP packages distributed by PDFlib GmbH. | |
| Japanese PDFlib PLOP & PLOP DS Reference Manual | |
| English pCOS Path Reference for pCOS interface 7 | |
| Japanese pCOS Path Reference pCOS interface 7 | |
