Opening a CLW File

The CLW file type is primarily associated with MUSCLE.

CLW	File extension: CLW
	File type:	text file

What is a CLW file?

CLW files mostly belong to MUSCLE. A CLW file stores data from a MUSCLE multiple sequence alignment. It is a plain text file that displays aligned sequences in a structured format similar to the ClustalW style.

This file lists sequences in blocks, showing gaps and aligned regions.

The alignment format is designed for bioinformatics tools and can be read by text editors.

It is used to compare protein, DNA, or RNA sequences and to study evolutionary relationships.

FilExt.com note: The file’s layout is strict; even small spacing differences can affect data interpretation. Tools like MEGA, Jalview, or BioEdit are often used to view and analyze its contents.

How to open a CLW file

You need a suitable software like MUSCLE to open a CLW 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 CLW file correctly, try to right-click or long-press the file. Then click "Open with" and choose an application. You can also display a CLW file directly in the browser:. Just drag the file onto this browser window and drop it.

Online CLW Text Viewer

Choose your .clw 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

Programs that open and convert CLW files:

MUSCLE
See the previous paragraphs to learn more about the main application. CLW files are often referred to as MUSCLE data files because this type of file is primarily created or used by this software.
Clarion for Windows (Source Code) by SoftVelocity
Clarion employs template driven technology to create database-driven applications. Related links: Clarion Magazine, Clarion Information
Visual C++ (Class Wizard File) by Microsoft Corporation

Technical Data for CLW File Extension

File classification:

Data

Related files:

aln, msa, fasta, phy, msf, clustal, clwstrict, aln, zip, bpp, tpr, tcf

Related links:

Clarion Magazine, Clarion Information

Mime type:

text/plain

a clw text file is a special file format and should only be edited and saved with the appropriate software.

How to solve problems with CLW files

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