Notepad++(Download here) Compare Plugin is a highly useful tool for file comparison, allowing users to easily identify differences between two files. However, users of this plugin may encounter issues with hash mismatch, which can result in inaccurate comparisons and frustration. In this article, we will explore how to fix hash mismatch issues with Notepad++ Compare Plugin, and help you improve your file comparisons with this powerful tool.

Notepad++ is one of the most popular and widely used text editors among developers, programmers, and coders. It offers a wide range of features and plugins that make it an ideal tool for coding and development purposes. One such plugin is the Notepad++ compare plugin, which allows users to compare files and folders efficiently.

However, sometimes the Notepad++ compare plugin may encounter hash mismatch issues while comparing files. This can be quite frustrating as it can cause your file comparisons to fail, making it challenging to identify differences between files accurately. Fortunately, there are several ways to fix this issue and improve your file comparisons. In this article, we will discuss how to fix hash mismatch issues in the Notepad++ compare plugin.

What is a Hash Mismatch Issue?

Before we dive into the solution, let’s first understand what a hash mismatch issue is. A hash value is a unique identifier generated from a specific input data. The Notepad++ compare plugin uses the SHA1 algorithm to generate hash values for files and compares them to identify any differences between the two files. When the hash values of two files do not match, it results in a hash mismatch issue.

The issue usually arises when the comparing process is interrupted or terminated prematurely, leading to incomplete or incorrect hash values. Additionally, malware or virus attacks on your system may cause changes to the files’ content, leading to hash value mismatches.

How to Fix Hash Mismatch Issues

Here are some of the ways to fix hash mismatch issues in the Notepad++ compare plugin:

1. Update the Plugin: Ensure that you have the latest version of the Notepad++ compare plugin installed. Outdated versions may contain bugs and may not work correctly, leading to hash mismatch issues.

2. Disable Antivirus: Sometimes, antivirus software may interfere with the comparing process, causing hash value mismatches. Disabling the antivirus temporarily may solve the problem.

3. Check File Permissions: Ensure that you have the necessary permissions to access and modify the files being compared. Lack of permissions may cause hash mismatch issues.

4. Clear Cache: Clearing the cache may help resolve hash mismatch issues. To do this, go to the Plugins menu, click Compare -> Clear Cache, and restart the comparison process.

5. Generate New Hash Values: If all else fails, generating new hash values for the files being compared may help resolve hash mismatch issues. To do this, right-click on the file, select Compare -> Generate Hash, and restart the comparison process.


Hash value mismatches in the Notepad++ compare plugin can be quite frustrating, but they are relatively easy to fix. Updating the plugin, disabling antivirus, checking file permissions, clearing the cache, and generating new hash values are some of the ways to resolve these issues. By following these tips, you can improve your file comparisons and make the most out of the Notepad++ compare plugin.

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