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UF2 file extension

The table below provides useful information about the .uf2 file extension. It answers questions such as:

  • What is the .uf2 file?
  • What program do I need to open a .uf2 file?
  • How can the .uf2 file be opened, edited or printed?
  • How can I convert .uf2 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

✅ USB Flashing Format Data

UF2 file is a USB Flashing Format Data. UF2 is a file format, developed by Microsoft for PXT (also known as Microsoft MakeCode), that is particularly suitable for flashing microcontrollers over MSC (Mass Storage Class).
Category: Other files
Application: UF2 Tools
Mime-type: application/octet-stream
Magic number: -
Magic string: -
Sample: -
UF2 aliases:
UF2 related links:
UF2 related extensions:

Other types of files may also use the .uf2 file extension.

🚫 The .uf2 file extension is often given incorrectly!

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

hf2, kf2, u2, uc2, uf, ut2, uv2

Is it possible that the filename extension is misspelled?

We found the following similar file extensions in our database:

IBM Rational Tau U2 Model
L3DT Compressed Heightfield Data
µVision v3 Project
Max Payne Model Data File
UltraCompressor 2 Compressed Archive
Crestron SIMPL Compile
Unreal Tournament 2003 Map File

🔴 Can't open a .uf2 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 .uf2 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 .uf2 file extension, write to us!

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