JHOVE
JHOVE (JSTOR / Harvard Object Validation Environment) - pronounced “jove” - was a joint project between JSTOR and the Harvard University Library to develop an extensible tool for format validation. JHOVE is an object validation tool that is limited to certain formats. It's written in Java . The Open Preservation Foundation took over the maintenance and further development for JHOVE in February 2015.
Version 1.16 is currently available for download; it is licensed under LGPLv 2. The download includes a version as a command-based tool and a GUI version. It is designed in such a way that third parties can add various header files to the software so that it can be shared with other applications that deal with file validation. JHOVE runs on all systems that support Java 1.6.
The following formats are currently supported by JHOVE:
Documents are examined with regard to their well-formedness (consistent with the basic requirements of the respective format) and validity (general internal consistency of the object). JHOVE determines whether a file meets the requirements of special profiles of a file format (e.g. PDF / X, HTML 4.0).
The JHOVE2 fork is currently also available, but it has a completely different software architecture. The project on Github has not been updated since 2014. The further development of JHOVE2 has now been discontinued.