DeveloperUtilityTools

Markdown Previewer & Editor

Write and preview markdown with live rendering, GitHub-flavored markdown support, syntax highlighting, and instant HTML export. All processing happens in your browser for complete privacy.

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About Markdown

Markdown is a lightweight markup language for creating formatted text. It's widely used for documentation, README files, and content creation.

  • Live preview: See your markdown rendered in real-time as you type
  • GitHub-flavored: Supports tables, task lists, strikethrough, and more
  • Export options: Download as .md or .html with styling included
  • Syntax highlighting: Code blocks with language support

What is Markdown?

Markdown is a lightweight markup language created by John Gruber in 2004. It allows you to write formatted text using a simple, easy-to-read plain text syntax that can be converted to HTML and other formats. Markdown has become the de facto standard for writing documentation, README files, blog posts, and technical content.

The beauty of Markdown lies in its simplicity and readability. Unlike HTML or other markup languages, Markdown files are readable as-is, even without being rendered. This makes it perfect for version control systems like Git, where you can see the actual content changes without wading through formatting tags.

GitHub-flavored Markdown (GFM) extends the original specification with additional features like tables, task lists, strikethrough text, and automatic URL linking. These extensions have become so popular that they're now supported by many Markdown parsers and editors.

Common Uses for Markdown

Documentation

Markdown is the standard format for writing software documentation, API references, and technical guides. Its simplicity allows developers to focus on content rather than formatting, while still producing professional-looking output.

README Files

Almost every GitHub repository includes a README.md file written in Markdown. It provides project overview, installation instructions, usage examples, and contribution guidelines in a format that's both readable in plain text and beautifully rendered on GitHub.

Blog Posts & Articles

Many static site generators (Jekyll, Hugo, Gatsby) and CMS platforms (Ghost, Dev.to) use Markdown for content creation. Writers can focus on their content without worrying about HTML tags or complex formatting interfaces.

Note-Taking

Note-taking apps like Obsidian, Notion, and Bear use Markdown for formatting. This allows notes to be portable, searchable, and future-proof since they're stored as plain text files that can be opened with any text editor.

Forums & Comments

Popular platforms like Reddit, Stack Overflow, Discord, and Slack support Markdown formatting in comments and messages. This allows users to format code snippets, create lists, and emphasize text without using complex editors.

Email Composition

Some email clients and services support Markdown for composing emails. This is particularly popular among developers who prefer writing in plain text while still being able to format their messages with headings, lists, and code blocks.

Markdown Syntax Quick Reference

ElementMarkdown SyntaxExample
Heading# H1 ## H2 ### H3Six levels available
Bold**bold text**Double asterisks or underscores
Italic*italicized text*Single asterisks or underscores
Blockquote> quoteGreater-than symbol
Ordered List1. First item
2. Second item
Numbers with periods
Unordered List- First item
- Second item
Dash, asterisk, or plus
Code`code`Backticks for inline code
Code Block```language
code
```
Triple backticks with language
Link[title](https://url.com)Brackets and parentheses
Image![alt](image.jpg)Exclamation mark before link
Table| Header |
| ------ |
| Cell |
Pipes and hyphens (GFM)

Frequently Asked Questions

What's the difference between Markdown and HTML?

Markdown is a lightweight markup language designed to be human-readable in its raw form, while HTML is more verbose and harder to read without rendering. Markdown files are easier to write and maintain, but HTML offers more control over styling and layout. Markdown is typically converted to HTML for display on websites. Think of Markdown as a simpler, more readable way to write content that will eventually become HTML.

What is GitHub-flavored Markdown (GFM)?

GitHub-flavored Markdown is a variant of Markdown that adds several useful features beyond the original specification. It includes support for tables, task lists (checkboxes), strikethrough text, automatic URL linking, code fencing with syntax highlighting, and emoji shortcodes. GFM is widely used not just on GitHub, but across many platforms and tools because it provides practical features that the original Markdown specification lacked.

Can I use HTML inside Markdown?

Yes! Most Markdown parsers allow you to include raw HTML directly in your Markdown files. This is useful when you need more control over formatting or want to use HTML elements that don't have Markdown equivalents (like centered text, custom colors, or complex tables). However, mixing too much HTML can defeat the purpose of using Markdown in the first place, which is simplicity and readability. Use HTML sparingly when Markdown's syntax can't achieve what you need.

Is my content safe when using this tool?

Absolutely. All Markdown parsing and HTML rendering happen entirely in your browser using JavaScript. No data is ever sent to our servers or any third party. You can even use this tool offline once the page is loaded. Your content stays private and secure on your device. We don't track, store, or have access to anything you write in the editor.

Can I export my markdown to other formats?

This tool allows you to copy the rendered HTML and the raw Markdown text. You can use the HTML output to paste into websites, email clients, or content management systems. The Markdown text can be saved to .md files for use in static site generators, GitHub repositories, or note-taking apps. For conversion to formats like PDF, Word, or LaTeX, you'd need to use additional tools like Pandoc.

Does this editor support syntax highlighting?

Yes! When you create code blocks using triple backticks followed by a language name (e.g., ```javascript), the preview will show syntax-highlighted code. This works for dozens of programming languages including JavaScript, Python, Java, C++, HTML, CSS, and many more. Syntax highlighting makes code examples easier to read and more professional-looking in documentation.

Why isn't my Markdown rendering correctly?

Common issues include: forgetting blank lines before lists or code blocks, incorrect indentation, mixing tabs and spaces, or using syntax that's specific to certain Markdown flavors. Make sure there's a blank line before and after lists, blockquotes, and code blocks. For lists, items should start at the beginning of a line or be properly indented. Check that code blocks use three backticks on their own lines. If you're copying from another editor, invisible characters might cause problems.

Can I create tables in Markdown?

Yes, tables are supported in GitHub-flavored Markdown (GFM). Create tables using pipes (|) to separate columns and hyphens (-) for the header row. For example: | Header 1 | Header 2 | | --------- | --------- | | Cell 1 | Cell 2 |. You can align columns using colons in the separator row: :--- for left, :---: for center, and ---: for right alignment. While table syntax can be a bit tedious to write by hand, many editors offer table generators to make it easier.

What's the best way to learn Markdown?

The best way to learn Markdown is by using it! Start with the basics: headings, bold, italic, and links. Then gradually add more features like lists, code blocks, and images as you need them. This interactive editor is perfect for practice—just start typing and see the results instantly. Keep a Markdown cheat sheet handy for reference. Within a few hours of use, you'll find the syntax becomes second nature. Most people can master the commonly-used Markdown features in an afternoon.

Are emoji supported in Markdown?

In GitHub-flavored Markdown, you can use emoji shortcodes like :smile:, :heart:, or :rocket: which render as emoji characters. You can also paste emoji directly into your Markdown text, and they'll appear in the output. This tool supports both methods. Emoji are great for adding visual interest to documentation, README files, and informal content. A full list of GitHub emoji codes is available in the GitHub emoji cheat sheet.

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