TUI HTML Editor A text microprocessor for HTML that works everywhere
TUI HTML Editor is a lightweight, completely standalone WYSIWYG editor built to work under any conditions. Its code is a single HTML file with no external dependencies that can be opened in any browser or embedded into any application supporting HTML page rendering.
The project's core philosophy: "Write once, run forever". The editor requires no updates, never breaks with browser version changes, and remains fully functional in the most exotic environments — from Windows 3.1 with Internet Explorer 4.0 to future quantum computers with DOM emulation.
✨ Key Features 📝 Text Formatting Full formatting command set: bold, italic, underline, strikethrough Alignment (left, right, center, justify) Font family and size selection (1–7) Text and background colors (216 web-safe palette) Indent control, format clearing
📊 Advanced Table Management Table creation with customizable parameters Add/remove rows and columns with intelligent integrity protection (rowSpan/colSpan validation) Merge and split cells (horizontal and vertical) Table attribute editor Automatic prevention of row/column deletion that would break merged cell structure
🔗 Document Structuring Create anchors for H1-H6 headings, tables, images, formulas, listings Insert links to created anchors (internal document navigation) Meta tags and page title management
📋 Lists Ordered and unordered lists Marker type selection (disc, circle, square) Numbering type selection (1, A, a, I, i) Multi-level list creation (hierarchy management)
🧹 HTML Cleaning (3 levels) Attributes — remove classes, styles, language tags Office tags — clean MS Word/Outlook garbage, VML graphics Deep cleaning — remove empty tags, office comments
🔧 Technical Highlights Marker tag insertion system — always see cursor position, prevents HTML breakage Undo/Redo — 20-step history, command undo/redo, auto-save Attribute editing: For legacy browsers (IE4+) — 13 key attributes For modern browsers (DOM1+) — full access to all attributes Support for legacy but useful tags:
, <xmp>, , , <plaintext>,, and others
🌐 Browser Support (and anything based on them)
Internet Explorer — 4.0 and newer (including 16-bit versions)
Gecko — Netscape 7.1, Mozilla 0.8 and newer (Firefox, SeaMonkey)
Presto — Opera 9.0 – 12.18
KHTML — Konqueror 4.1 and newer
WebKit/Blink — Safari 1.3 and newer, Chrome (all versions), Edge (all versions)
WebView2 and .NET/CLR embedded browsers — full support
HTML document fields in applications using embedded browser engines
🎯 Who Is This For
Developers needing a reliable editor for legacy systems and embedded solutions
Creators of offline documentation, e-books, help systems
Retro-computing enthusiasts restoring old projects
Anyone who values minimalism, independence, and code longevity
📦 Distribution Package
editor.html — monolithic editor file (all-in-one: HTML, CSS, JavaScript)
demo/ — embedding and usage examples (optional)
README.md — this file
🚀 Quick Start
Download editor.html
Open it in any browser
Start editing!
For embedding in your application:
Use an <iframe> tag pointing to editor.html
Or load the file content as a string and insert into your app's HTML container
Interact with the editor via JavaScript (DOM access, function calls)
⚖️ License
Free to use. Open source. You may modify, distribute, and use the editor for any purpose — both personal and commercial.
Crafted with care for those who value reliability and independence from trends.