Here are some HTML editors that let you edit raw HTML and also provide a WYSIWYG interface:

Windows Applications:

• BlueGriffon: https://bluegriffon.org/
• KompoZer: https://sourceforge.net/projects/kompozer/
• Visual Studio Code (with Live Server extension): https://code.visualstudio.com/

Online Editors:

• HTML Online Editor: https://html-online.com/editor/
• JSFiddle: https://jsfiddle.net/
• CodePen: https://codepen.io/
• JSBin: https://jsbin.com/

Best simple choice: BlueGriffon or HTML Online Editor.
Best for full control: VS Code + Live Server

Thanks ssvl.

Just to clarify: I want to edit in the WYSIWYG window.

I've been pleased with both TinyMCE and CKEditor. Both are highly customizable and adaptable, but also very easy for users to work with.

Dreamweaver - https://www.adobe.com/products/dreamweaver.html

Seamless Live View editing

Edit text and image properties and add classes directly in Live View with one click — then preview changes instantly. No need to switch to a separate edit mode.

Multi-monitor support for Windows

Now you can expand your workspace by displaying your pages on multiple monitors.

Redesigned, modern UI

A streamlined and clutter-free interface lets you customize your workspace to show only the tools you need to code.

Git support

Collaboration is easy with Git support. Manage all your source code within Dreamweaver and perform all common operations right from the Git panel.

Sorry, everyone, I did not make it clear that I was looking for a low cost solution.

You could have a look at these:

https://www.wysiwygwebbuilder.com/

https://www.quickandeasywebbuilder.com

https://www.coffeecup.com/designer/

This is from Google AI. Some have already been recommended by other experts.

• 
  TinyMCE:

  A highly popular choice, used by many leading websites and applications, known for its robust features and comprehensive functionality. It's free to use for both commercial and non-commercial purposes. 

   

  • CKEditor:

    Another well-regarded open-source option, CKEditor is known for its modular architecture, clear UI, and customization features. CKEditor 5 is a modern JavaScript-based editor. 

     

• Froala:

  A lightweight, JavaScript-based WYSIWYG editor that's easy to integrate into applications. Froala also provides good Markdown support. 

   

• KompoZer:

  A free, open-source WYSIWYG editor that allows users to create websites through a graphical interface without needing to write HTML or CSS. 

   

• BlueGriffon:

  A free, open-source web page editor with a GUI for creating web pages. 

   

• Brackets:

  A lightweight, open-source editor with a sleek, modern design and live preview functionality. 

   

• SeaMonkey:

  A free, all-in-one suite with a built-in browser and FTP capability for easy web page publishing. 

   

• Google Web Designer:

  A free tool from Google that offers comprehensive features for designing websites, including WYSIWYG mode and code view for HTML, CSS, and JavaScript.