How do I convert HTML to PDF?

Use KaijuConverter's HTML-to-PDF converter, or print the page from your browser and choose "Save as PDF". For pixel-perfect conversion with page breaks, dedicated tools like wkhtmltopdf or Puppeteer give more control.

HTML vs OPML — Differences, File Size & When to Use Each

Q: What is an HTML file?

HTML (HyperText Markup Language) is the core language of the web, created by Tim Berners-Lee in 1993. An HTML file is plain text describing structure (headings, paragraphs, links, images), optionally with styling (CSS) and interactivity (JavaScript). Every web page you visit is rendered from HTML.

Q: How do I open an HTML file?

HTML files open in every web browser by double-clicking. To edit, use any text editor (Notepad, VS Code, Sublime Text) or a visual editor (Dreamweaver, Pinegrow). Mobile browsers also render HTML files from local storage.

Q: How do I convert HTML to PDF?

Use KaijuConverter&#039;s HTML-to-PDF converter, or print the page from your browser and choose &quot;Save as PDF&quot;. For pixel-perfect conversion with page breaks, dedicated tools like wkhtmltopdf or Puppeteer give more control.

Q: HTML vs Markdown: which should I use?

Markdown for authoring — it&#039;s faster to write, version-control-friendly, and renders to HTML via static-site generators. HTML for delivery and complex layouts where you need full control over styling, forms, and interactivity. Most modern blogs write in Markdown and publish as HTML.

Q: Why does my HTML look different in different browsers?

Browsers implement CSS and JavaScript slightly differently, especially for cutting-edge features. Use a CSS reset, test in Chrome/Firefox/Safari, and tools like caniuse.com to check browser support. Modern frameworks (Tailwind, Bootstrap) normalize most cross-browser quirks automatically.

Q: Can HTML files be dangerous to open?

HTML itself is safe, but embedded JavaScript can perform malicious actions (redirects, form hijacking, cryptomining). Only open HTML attachments from trusted sources. Modern browsers sandbox local HTML files to limit their access to your system.

HTML vs OPML

Ein detaillierter Vergleich von HTML Document und OPML Outline — Dateigröße, Qualität, Kompatibilität und welches je nach Workflow zu wählen ist.

HTML → OPML umwandeln OPML → HTML umwandeln

HTML

HTML Document

Documents & Text

HTML is the standard markup language for web pages. As a conversion target or source, it carries text content with structural and formatting information that can be extracted or repurposed.

Über HTML-Dateien

OPML

OPML Outline

Documents & Text

OPML (Outline Processor Markup Language) is an XML format for structured outlines and lists. It is most widely used for exchanging RSS feed subscription lists between podcast apps and feed readers, and for hierarchical note-taking.

Über OPML-Dateien

Vorteilsvergleich

HTML Vorteile

Universal — every browser, OS, email client, and document reader displays HTML.
Plain text, human-readable, grep-able, and diffable in git.
Flexible — pages render even with broken or partial markup (error-tolerant parser).
Carries structure, styling (CSS), and behavior (JavaScript) in one file.
Accessibility-friendly when written with semantic tags and ARIA attributes.

OPML Vorteile

Standard RSS subscription interchange format.
Simple XML — easy to parse and generate.
Highly extensible via arbitrary attributes.
Supported by every major outline and RSS tool.

Einschränkungen

HTML Einschränkungen

Error tolerance allows sloppy markup to hide real bugs.
Rendering depends on browser engine — pixel-perfect cross-browser output is an art form.
Security-sensitive — unsafe HTML can execute scripts or leak data (XSS vulnerabilities).
File size for equivalent structured data is larger than JSON or XML due to tag verbosity.
No built-in typing or schema — contract between server and client is informal.

OPML Einschränkungen

XML verbosity — larger than a JSON-based equivalent.
Specification is loose — different tools disagree on edge cases.
Primary use (RSS reading) has shrunk dramatically since Google Reader.
No strong central stewardship.

Technische Spezifikationen

Spezifikation	HTML	OPML
MIME type	text/html	text/x-opml
Extensions	.html, .htm	—
Standard	HTML Living Standard (WHATWG)	OPML 2.0 (2006)
Character encoding	UTF-8 (recommended)	—
Element count	~110 in current spec	—
Extension	—	.opml
Format	—	XML with nested <outline> elements
Primary use	—	RSS subscription interchange

Typische Dateigrößen

HTML

Hello-world page < 1 KB
Blog post (rendered HTML) 5-40 KB
Modern SPA (initial HTML shell) 50-200 KB
Full archived web page (with inline assets) 500 KB - 10 MB

OPML

Typical RSS reader export (50 feeds) 5-30 KB
Deep outline (Scrivener novel plan) 20-200 KB

Bereit zum Umwandeln?

Wandle zwischen HTML und OPML online um, kostenlos und ohne Installation. Verschlüsselter Upload, automatische Löschung in 60 Minuten.

HTML zu OPML umwandeln OPML zu HTML umwandeln

Häufig gestellte Fragen

HTML (HyperText Markup Language) is the core language of the web, created by Tim Berners-Lee in 1993. An HTML file is plain text describing structure (headings, paragraphs, links, images), optionally with styling (CSS) and interactivity (JavaScript). Every web page you visit is rendered from HTML.

HTML files open in every web browser by double-clicking. To edit, use any text editor (Notepad, VS Code, Sublime Text) or a visual editor (Dreamweaver, Pinegrow). Mobile browsers also render HTML files from local storage.

Use KaijuConverter's HTML-to-PDF converter, or print the page from your browser and choose "Save as PDF". For pixel-perfect conversion with page breaks, dedicated tools like wkhtmltopdf or Puppeteer give more control.

Markdown for authoring — it's faster to write, version-control-friendly, and renders to HTML via static-site generators. HTML for delivery and complex layouts where you need full control over styling, forms, and interactivity. Most modern blogs write in Markdown and publish as HTML.

Browsers implement CSS and JavaScript slightly differently, especially for cutting-edge features. Use a CSS reset, test in Chrome/Firefox/Safari, and tools like caniuse.com to check browser support. Modern frameworks (Tailwind, Bootstrap) normalize most cross-browser quirks automatically.

HTML itself is safe, but embedded JavaScript can perform malicious actions (redirects, form hijacking, cryptomining). Only open HTML attachments from trusted sources. Modern browsers sandbox local HTML files to limit their access to your system.