Compare Two Files in Notepad++

Learn how to compare two text files and what to do when the Compare plugin is unavailable.

When to use this feature

A comparison highlights changed, inserted or removed lines between two documents.

Step-by-step instructions for Windows users

1. Open Notepad++ on Windows 10 or Windows 11 and save a backup of the file you plan to edit.
2. Open both files, use Plugins Admin to look for a compatible Compare plugin, then run its comparison command if installed.
3. Plugin availability varies by application version and architecture; check the plugin's compatibility information.
4. Review the result and save a separate copy before replacing the original file.

Important details and compatibility

Plugin availability varies by application version and architecture; check the plugin's compatibility information.

Menu labels can differ between versions, and plugins may require a compatible build. Check the application settings on your own PC rather than assuming all installations have the same options.

Common mistakes and safety

If a plugin is unavailable, use a trusted dedicated diff tool rather than downloading an unknown plugin package.

If the result differs from what you expected, undo the change, reopen the original copy, and repeat the steps with a smaller sample.

Frequently asked question

Does Notepad++ compare files by default?

A comparison workflow typically uses an additional plugin or external diff tool.

Does this work in the US and Canada?

These Windows editing features are not region-restricted. The instructions use American English menu terminology and apply to supported Windows PCs in the United States and Canada.

Related Notepad++ resources

See the download guide, Windows 11 instructions, FAQ, and all tutorials.

Editorial team · Published 2026-10-20 · Updated 2026-10-20. This is an instructional guide, not a claim of hands-on testing on every Windows build.