Opening CLUSTAL_NUM Files

The CLUSTAL_NUM file type is primarily associated with Clustal Omega.

CLUSTAL_NUM	File extension: CLUSTAL_NUM
	File type:	Numerical Alignment Data

What is a CLUSTAL_NUM file?

CLUSTAL_NUM files mostly belong to Clustal Omega. A *.CLUSTAL_NUM file stores numerical data representing a multiple sequence alignment (MSA) generated by Clustal Omega. Clustal Omega is a widely used bioinformatics tool for aligning three or more biological sequences (DNA, RNA, or protein). The numerical representation in *.CLUSTAL_NUM files, as opposed to the more common character-based representation in *.clustal or other formats, facilitates downstream analyses that require numerical inputs, such as phylogenetic tree construction or machine learning-based sequence analysis. The specific format within these files is not standardized but generally consists of numerical values corresponding to the aligned residues or nucleotides, often using gap penalties and substitution matrices to quantify the alignment. This format is designed for computational efficiency and integration with other bioinformatics tools.

How to open a CLUSTAL_NUM file

You need a suitable software like Clustal Omega to open a CLUSTAL_NUM file. You need a suitable software like Clustal Omega to open a CLUSTAL_NUM file. Without proper software you will receive a Windows message "How do you want to open this file?" or "Windows cannot open this file" or a similar Mac/iPhone/Android alert. If you cannot open your CLUSTAL_NUM file correctly, try to right-click or long-press the file. Then click "Open with" and choose an application. You can also display a CLUSTAL_NUM file directly in the browser:. Just drag the file onto this browser window and drop it.

Online CLUSTAL_NUM Text Viewer

Choose your .clustal_num file to analyze

or drag and drop it here

Online File Viewer

✈

Read our privacy guarantee in Filext’s terms and privacy policy

Please allow ads on our site

This helps us keep our servers running. Then re-upload your file to view it.

Click here to see how to disable the ad blocker for filext.com

What to Do When a .CLUSTAL_NUM File Fails to Open

CLUSTAL_NUM files can originate from different bioinformatics workflows and aren't universally openable by standard apps.

Identify the Source: These files often come from computational biologists performing multiple sequence alignments, strongly suggesting the use of Clustal Omega or similar pipelines.
Check the Header: Open the file in a text editor to inspect the first lines.
- Plain text with sequence identifiers indicates standard numerical alignment data.
- Unreadable characters or "PK" suggests a compressed archive.
Use the Original Software: Opening these files usually requires the original program; try Clustal Omega, Jalview, or BioEdit, or ask the sender if uncertain.
Use this Webpage: Drag and drop your file into our viewer to detect the format, extract readable text or metadata, and preview when possible.

Technical Data for CLUSTAL_NUM File Extension

File classification:

Bioinformatics, Multiple Sequence Alignment

Related files:

num, aln

a clustal_num Numerical Alignment Data is a special file format and should only be edited and saved with the appropriate software.

How to solve problems with CLUSTAL_NUM files

Associate the CLUSTAL_NUM file extension with the correct application.
Update your software that should actually open numerical alignment data files. Because only the current version supports the latest CLUSTAL_NUM file format. Search, therefore, e.g. on the manufacturer website after an available Clustal Omega update.
To make sure that your CLUSTAL_NUM file is not corrupted or virus-infected, get the file again and scan it with Google's virustotal.com.
Click here to open your .CLUSTAL_NUM file online - secure, fast, and no downloads needed.