I have a file which apparently contains serialized structures. The first 26 bytes contain the string "java.util.HashMap", so I am sure that this file holds serialized data.

Is there is nice tool maybe with a simple UI, where I can show the structured data?

I googled for it for a while, but I didn't find any proper resources. It should run preferred on Windows. Linux would be fine too but is overhead for me.

1 Answer 1



There is tool from Google called "jdeserialize":

jdeserialize is a library that interprets Java serialized objects -- the data generated by an ObjectOutputStream. It also comes with a command-line tool that can generate compilable class declarations, extract block data, and print textual representations of instance values.

Project site of jdeserialize
Git repository of jdeserialize


There is also a Java library called "Serialysis", that can be used to generate human-readable output of a serialized object, like so:

SEntity sint = SerialScan.examine(new Integer(5));

...produces this output:

SObject(java.lang.Integer) {
  value = Prim(int){5}

Explanation of how Serialysis works
Git repository of Serialysis

Since both projects are written in Java, you can use them in both Windows and Linux.

  • Amazing tool, looks like what I'm looking for.
    – rekire
    Jul 31, 2016 at 13:52
  • 2
    Since I was not sure how to compile it you can find the compiled jar at code.google.com/archive/p/jdeserialize/downloads
    – rekire
    Jul 31, 2016 at 13:56
  • Update 2023: jdeserialize and Serialysis seem to no longer be maintained. I had a NullPointerException with jdeserialize, so it may be totally obsolete. I had more luck with SerializationDumper: github.com/NickstaDB/SerializationDumper
    – joH1
    May 17, 2023 at 15:48
  • Serialysis is old, but still worked as described for me. The latest version 0.9 is hosted on Maven Central. Oct 22, 2023 at 14:53

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