Detecting Structure in Plain Text

A good text-to-HTML converter detects paragraphs (double newlines), headings (all-caps lines or lines ending with nothing on the next line), lists (lines starting with -, *, or 1.), and blockquotes (lines starting with >). Our converter applies semantic elements:

-

,
/
,
, and blocks. Single newlines within paragraphs become tags or are ignored depending on the mode. Accessibility in Generated HTML The tool outputs proper heading hierarchy — it does not skip levels (h1 to h3 without h2). Detected image references get alt text placeholders. Lists get proper nesting. The output is Pass-Through with no inline styles, making it ready for CMS integration. ARIA labels are added where the structure maps to landmark roles (navigation, complementary). XSS Prevention in HTML Output When converting user-provided text to HTML, sanitize all output by encoding angle brackets, ampersands, and quotes. Our tool defaults to safe mode where all HTML tags are escaped. A separate "passthrough" mode preserves existing tags but never allows T Free ToolsAll ToolsBlogDeveloperCalculatorsDocumentsAboutFAQDisclaimerContact Back to Blog Web Development From Plain Text to Semantic HTML: A Conversion Guide Convert plain text to accessible, semantic HTML with proper heading hierarchy, lists, and structure — without XSS risks. By Zohaib2026-05-307 min read Detecting Structure in Plain Text A good text-to-HTML converter detects paragraphs (double newlines), headings (all-caps lines or lines ending with nothing on the next line), lists (lines starting with -, *, or 1.), and blockquotes (lines starting with >). Our converter applies semantic elements: - , /, , and blocks. Single newlines within paragraphs become tags or are ignored depending on the mode. Accessibility in Generated HTML The tool outputs proper heading hierarchy — it does not skip levels (h1 to h3 without h2). Detected image references get alt text placeholders. Lists get proper nesting. The output is Pass-Through with no inline styles, making it ready for CMS integration. ARIA labels are added where the structure maps to landmark roles (navigation, complementary). XSS Prevention in HTML Output When converting user-provided text to HTML, sanitize all output by encoding angle brackets, ampersands, and quotes. Our tool defaults to safe mode where all HTML tags are escaped. A separate "passthrough" mode preserves existing tags but never allows