The mission of the Apache Portable Runtime (APR) project is to create and maintain software libraries that provide a predictable and consistent interface to underlying platform-specific implementations. The primary goal is to provide an API to which software developers may code and be assured of predictable if not identical behaviour regardless of the platform on which their software is built, relieving them of the need to code special-case conditions to work around or take advantage of platform-specific deficiencies or features.

The recommended releases of the several Apache Portable Runtime libraries are

The current legacy releases in support of older applications such as Apache HTTP Server 2.0.x are

The Apache Software Foundation and the Apache Portable Runtime Project are proud to announce the General Availability of version 1.4.6 of the APR Apache Portable Runtime library. This is a bug fix release. Users of previous versions are encouraged to update to this release.

For further details of this release, see the official announcement as well as the CHANGES-APR-1.4 file.

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Programmer's Manual: APR

The Apache Software Foundation and the Apache Portable Runtime Project are proud to announce the General Availability of version 1.4.1 of the APR Apache Portable Runtime Utility library. This is a new feature release, introducing the apr_crypto API.

For further details of this release, see the official announcement as well as the CHANGES-APR-UTIL-1.4 file.

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The Apache Software Foundation and the Apache Portable Runtime Project are proud to announce the General Availability of version 0.9.20 of the APR Apache Portable Runtime library.

The corresponding version 0.9.19 of the companion APR-util Apache Portable Utility library and version 0.9.7 of the companion APR-iconv library, an alternative portable implementation of the 'iconv' library, remain current.

This version of APR is a security and bug fix release, and is provided only for users requiring APR 0.9 compatibility. Most developers are encouraged to adopt the latest APR 1.x version to ensure the most comprehensive support and access to the latest features and enhancements.

For further details of this legacy release, see the official announcement, as well as the CHANGES-APR-0.9, CHANGES-APR-UTIL-0.9, and CHANGES-APR-ICONV-0.9 files.

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Programmer's Manual: APR | APR-util | APR-iconv

After several years of development, APR is beginning to see use outside of the Apache HTTP Server. To encourage more people to investigate APR for their projects, here are a list of both Open Source and Commercial projects that are currently using APR. If you are using APR, and would like your project recognized, please send e-mail to the developer's mailing list.

The following is a list of supported development projects under the APR Project. All of the development happens on the indicated mailing lists. See mailing lists to learn how to take part in these discussions. Or, check the archives.

apr - a portable runtime library

apr-util - a companion library to APR

apr-iconv - a portable implementation of the iconv() library

We hope this website starts you in the right direction. Please read the docs and tutorials for the project you are interested in. If you have suggestions of any sort, please feel free to send us an email at dev@apr.apache.org!