A daily updated filename extension database!

CU1 file extension

The table below provides useful information about the .cu1 file extension. It answers questions such as:

  • What is the .cu1 file?
  • What program do I need to open a .cu1 file?
  • How can the .cu1 file be opened, edited or printed?
  • How can I convert .cu1 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

CU1 file is a PhotoLine 4 Curve Data. PhotoLine is a is a multi-featured image processor software.
CU1 format description not yet available
Category: Data files
Application: PhotoLine
Mime-type: application/octet-stream
Magic number: -
Magic string: -
Sample: -
CU1 aliases:
CU1 related links:
CU1 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 Pattern Data

PhotoLine 4 Curve Data

PhotoLine 4 Defaults Data

Other types of files may also use the .cu1 file extension.

🚫 The .cu1 file extension is often given incorrectly!

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

c1, ch1, ck1, cu, cul, cuw, du1

Is it possible that the filename extension is misspelled?

We found the following similar file extensions in our database:

Windows Cursor Library
Toyota Calibration Update Wizard Data
Lotus Freelance Graphics Chart
1C:Enterprise Configuration Update Data
Commander Keen Data File
ChessBase Tactics Key Data
CUDA Source Code
POV-Ray Include File
my Knowledge Explorer Change Unit
Atari ST DUO Image

🔴 Can't open a .cu1 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 .cu1 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 .cu1 file extension, write to us!

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