Why Notepad++ Is Slow? Top Reasons & Quick Fixes

Notepad++ is widely known for its lightweight and fast performance. However, some users experience unexpected slowdowns, making text editing frustrating.

If you’re wondering why Notepad++ is slow, this guide explores the causes and provides actionable solutions to speed it up.

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Common Reasons Why Notepad++ Is Slow

1. Large File Size

Notepad++ may struggle when handling extremely large files (hundreds of MBs or more). Unlike dedicated text processors, it lacks built-in memory optimization for massive data loads.

2. Too Many Plugins Installed

While plugins extend functionality, too many of them running simultaneously can drastically slow down Notepad++. Some third-party plugins are poorly optimized, increasing processing time.

3. Syntax Highlighting Issues

Notepad++ uses syntax highlighting to improve readability for coding. However, highlighting large scripts, particularly in languages like Python or JavaScript, can strain system performance.

4. Background Processes

Heavy applications running in the background (e.g., web browsers, video editors, or virtual machines) can consume CPU and RAM, leaving fewer resources for Notepad++.

5. Corrupt Configuration Files

Over time, Notepad++’s configuration files may become corrupted, leading to performance issues. Resetting these files can sometimes resolve slowness.

6. Auto-Completion and Real-time Features

Features like auto-save, auto-completion, and real-time spell-checking, while useful, can slow down performance, especially with large documents.

7. Settings and Configuration Issues

Default settings may not be optimized for performance. Enabling unnecessary features or using inefficient configurations can contribute to slowness.

8. Outdated Notepad++ Version

Using an outdated version might result in bugs or performance issues that have already been fixed in newer releases.

9. System Resource Limitations

If your computer has low RAM or an older processor, Notepad++ might struggle, particularly with large files or intensive tasks.

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How to Fix Notepad++ Slowness

1. Optimize Settings for Performance

• Disable real-time spell-checking if unnecessary.
• Reduce auto-save frequency or turn it off.
• Disable session snapshot and periodic backup under Preferences → Backup.

2. Disable or Remove Unnecessary Plugins

Go to Plugins → Plugins Admin and uninstall unnecessary or problematic plugins. This can improve response time significantly.

3. Free Up System Resources

• Close resource-heavy applications running in the background.
• Restart your computer to free up memory.
• Use Task Manager (Ctrl + Shift + Esc) to check and kill high CPU-usage processes.

4. Adjust Syntax Highlighting Settings

For large files, disabling syntax highlighting can improve performance:

• Go to Language → None (Normal Text).
• If you need syntax highlighting, use minimalistic themes instead of complex ones.

5. Update Notepad++

Ensure you are using the latest version:

• Go to Help → About Notepad++ to check your version.
• Download the latest version from the official Notepad++ website.

6. Tweak Configuration Settings

Reset configuration files to default:

• Navigate to C:\Users\[YourUser]\AppData\Roaming\Notepad++.
• Delete the config.xml file (Notepad++ will generate a fresh one).

7. Use a 64-bit Version of Notepad++

If you’re running a 32-bit version, upgrading to Notepad++ 64-bit can improve performance, especially for handling large files.

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Advanced Tips for Power Users

• Use Notepad++ Portable to avoid system conflicts.

• Adjust RAM usage allocation in your system settings.

• Try alternative themes with better optimization for large text files.

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When to Use Alternatives?

If Notepad++ still lags despite optimization, you might consider alternatives:

• Sublime Text – Better for handling massive files.

• VS Code – More features and plugins for power users.

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Conclusion

Notepad++ slowness can be caused by large files, plugins, outdated versions, or system limitations.

By tweaking settings, removing unnecessary plugins, and optimizing system performance, you can restore Notepad++ to its fast and efficient state.

If issues persist, consider switching to a lightweight alternative.

Related Articles:- Will Notepad++ Work on Mac? Your Quick Guide

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