Web-based Word-like rich text editor in one HTML file

A Chinese prompt for Gemini-3.0-Pro to build a Word-style rich text editor as a single HTML file, including major formatting features and a download option.

Prompt by @karminski-牙医View the original post ↗Published 2025-11-19CC BY 4.0

The prompt

Fill in the blanks — 1 placeholder

Edit any of these and the prompt below updates. Copy gives you the filled-in version.

Help me write a web-based rich text editor similar to Word, including its main features, with all code contained in a single HTML file. It should support: headings, paragraphs, left alignment, bold, italic, right alignment, underline, strikethrough, background color, text color, numbering, undo, and finally a download function. Directly generate the HTML, and that’s it!

Generate opens this prompt in the editor, ready to run.

Model
Gemini 3
Media
Image
Language
Chinese
Words
57
Abstract / Background

How to use this prompt

  1. 1Copy the prompt — fill in any placeholders first and the copy takes your version.
  2. 2Paste it into your image model, or press Generate to open it here with your own photo.
  3. 3Run it twice. Generation is not deterministic and the second pass is often the keeper.
  4. 4Finish it with the free tools: upscale, crop to the platform you need, compress before sharing.

Go beyond generating the image

Everything after the generation, on the same site.

Upscale to 4K →Remove the background →Crop for a platform →Compress before sharing →All AI apps →

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