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QUAL file extension

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

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

✅ Quality Score File

QUAL file is a Quality Score File. In bioinformatics, QUAL is a quality score file, which contains a score for each base in each sequence included in the FASTA file.
Category: Data files
Application: NextGENe
Mime-type: application/octet-stream
Magic number: -
Magic string: -
Sample: -
QUAL aliases:
QUAL related links:
QUAL related extensions:
FASTA Sequence

GCG DNA Sequence

GenBank Data

FASTQ Sequence

FASTA Index Data

Mauve eXtended Multi-FastA Data

Mauve Alignment Data

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

🚫 The .qual file extension is often given incorrectly!

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

qal, qua, ual

Is it possible that the filename extension is misspelled?

We found the following similar file extensions in our database:

Avira AntiVirus Quarantined File
Entrust Auto-enrollment Server Unattended Login Credentials
OpenMap Quality Data

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

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