A daily updated filename extension database!

CER file extension

The table below provides useful information about the .cer file extension. It answers questions such as:

  • What is the .cer file?
  • What program do I need to open a .cer file?
  • How can the .cer file be opened, edited or printed?
  • How can I convert .cer files to another format?

We hope you find this page helpful and a valuable resource!

2 extension(s) and 0 alias(es) found in database

✅ Broderbund PrintMaster Certificate

CER file is a Broderbund PrintMaster Certificate document. PrintMaster is a software for making card, posters, banners, etc.
CER format description not yet available
Category: Document files
Application: PrintMaster
Mime-type: application/octet-stream
Magic number: -
Magic string: -
Sample: -
CER aliases:
CER related links:
CER related extensions:
Broderbund PrintMaster Label

Broderbund PrintMaster Business Card

Broderbund PrintMaster Calendar

Broderbund PrintMaster Poster

Broderbund PrintMaster Banner

Broderbund PrintMaster Card

Broderbund PrintMaster Envelope

Broderbund PrintMaster Letterhead

Broderbund PrintMaster Post Card

✅ MSI Cerius 2 Format Data

CER file is a MSI Cerius 2 Format Data. Cerius 2 is a graphical interface to DMol3 that uses the X Window System.
CER format description not yet available
Category: Data files
Application: OpenBabel
Mime-type: chemical/x-cerius
Magic number: -
Magic string: -
Sample: -
CER aliases:
CER related links:
CER related extensions:

Other types of files may also use the .cer file extension.

🚫 The .cer file extension is often given incorrectly!

According to the searches on our site, these misspellings were the most common in the past year:

cdr, ce, ced, cee, cef, ceg, cet, cfr, cr, cre, crr, csr, cwr, der, ecr

Is it possible that the filename extension is misspelled?

We found the following similar file extensions in our database:

E-Cell 2 Rule Data
CRiSP Macro File
CorelDraw Drawing
TSP-INet Server CDR Data
Version Information
Certificate Signing Request
EEGLAB Channel Data
Cgatools CRR File
SVAL Correction Data
Java Serialized Object

🔴 Can't open a .cer file?

When you double-click a file to open it, Windows examines the filename extension. If Windows recognizes the filename extension, it opens the file in the program that is associated with that filename extension. When Windows does not recognize a filename extension, you receive the following message:

Windows cannot open this file:


To open this file, Windows needs to know what program you want to use to open it...

If you don't know how to set the .cer file association, check the FAQ.

🔴 Can I change the extension of files?

Changing the filename extension of a file is not a good idea. When you change a file's extension, you change the way programs on your computer read the file. The problem is, changing the file extension does not change the file format.

If you have helpful information about the .cer file extension, write to us!

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