A daily updated filename extension database!

CU3 file extension

The table below provides useful information about the .cu3 file extension. It answers questions such as:

  • What is the .cu3 file?
  • What program do I need to open a .cu3 file?
  • How can the .cu3 file be opened, edited or printed?
  • How can I convert .cu3 files to another format?

Table of Contents

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

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

✅ PhotoLine 4 Curve Data

CU3 file is a PhotoLine 4 Curve Data. PhotoLine is a is a multi-featured image processor software.
CU3 format description not yet available
Category: Data files
Application: PhotoLine
Mime-type: application/octet-stream
Magic number: -
Magic string: -
Sample: -
CU3 aliases:
CU3 related links:
CU3 related extensions:
Adobe Photoshop Image

Gimp Image

PhotoLine Image

CinePaint XML-tagged Image

Paint.NET Image File

Corel Paint Shop Pro Image

Corel Paint Shop Pro Pattern

PhotoLine 4 Curve Data

PhotoLine 4 Pattern Data

PhotoLine 4 Defaults Data

Other types of files may also use the .cu3 file extension.

🚫 The .cu3 file extension is often given incorrectly!

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

c3, ch3, ci3, ck3, cu, cue, cur, cuw, cy3, su3, uc3, vu3

Is it possible that the filename extension is misspelled?

We found the following similar file extensions in our database:

CDRWIN Cue Sheet File
Windows Custom Cursor
Oasys T/HIS Curve File
Eudemons Online 3D Model
Commander Keen Data File
Toyota Calibration Update Wizard Data
CU-SeeMe Data
Harvard Graphics 3.0 Chart
Cytel StatXact 5.0 Data
1C:Enterprise Configuration Update Data

🔴 Can't open a .cu3 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 .cu3 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 .cu3 file extension, write to us!

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