File Extension SER

.SER File

File extension: SER
File type: Serialized Object File


Notes about the SER file extension:



To open this file type, a required software must be installed. Without it you only see a Windows message "The following file cannot be opened" (Windows 7) or "How do you want to open this file?" (Windows 10) if you double-click the file. There click on "More apps" and choose a suitable software to view such files on your PC or from email attachments.

The SER file type is primarily associated with 'Java' by Sun. Many java programs save their objects using Serialization. A common extention for serialized objects is .SER.

Detailed information for file extension SER:


Primary association: Java
Company: Sun
Mime type: application/java-serialized-object, application/x-java-serialized-object

Other applications associated with file type SER:

  • Unknown Apple II File ((found on Golden Orchard Apple II CD Rom))
  • Webalizer.01 Language File



To change file associations press Windows Key + X and then Apps and Features > Default apps > Choose default apps by file type. Invalid file associations could be the result of underlying issues within your Windows PC.

Technical data

To view technical data on file-extension SER click this link to expand/hide the additional area.

System Info for File Extension .SER

The following listing is compiled from the database produced by the 'Associate This!' program, selected data from the main FILExt database and information FILExt collected directly from user systems.

ProgramID: Metamail Server File
EXEFile: %ProgramFiles%\Metamail Inc\Metamail Reader\METAMAIL SECURE VIEWER.EXE %1

ProgramID: Metamail Server File
EXEFile: %ProgramFiles%\Metamail Inc\Metamail Reader\MMViewer.exe %1


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