Is Konnect2Tools free?

Yes. These in-browser tools are completely free to use with no account required for core functionality.

Do my files leave my device?

Browser document operations run locally, except where the operation uses an external service, such as AI summarisation. Read the processing note before using sensitive inputs.

Is the Markdown Preview tool safe to use?

Local operations process document content on your device. External-service operations may send inputs as described in the processing note. Keep originals and inspect the output.

What is the difference between Markdown and HTML?

Markdown is a human-readable plain text format that converts to HTML. HTML is the rendered output. Markdown is easier to write and read, but HTML offers more control. Most Markdown parsers allow raw HTML inline — useful for complex formatting not supported by Markdown syntax.

How do I add syntax highlighting to code blocks?

Fence your code block with triple backticks and specify the language: ```javascript ... ```. Most Markdown renderers (GitHub, VS Code, Pandoc) use Prism or highlight.js to syntax-highlight the code based on the language identifier.

Can I use Markdown in WhatsApp or messaging apps?

WhatsApp, Telegram, and Slack have their own Markdown-like formatting but not full Markdown. WhatsApp: *bold*, _italic_, ~strikethrough~, ```monospace```. Slack: *bold*, _italic_, ~strike~, `code`. GitHub, Notion, Obsidian, and Dev.to support full standard Markdown.

How do I convert Markdown to PDF?

Use Pandoc (command-line): pandoc input.md -o output.pdf. For GitHub README PDFs, use a browser — open the rendered README and print to PDF. VS Code with the Markdown PDF extension is the easiest option for developers.

Developer & data utilities

Markdown Preview

Write Markdown and see the live HTML preview side by side.

Run Markdown Preview online

In-browserDocument processing runs on your device. External resources may still load.

Enable JavaScript to use the interactive tool. Read the instructions, limitations and FAQs below before starting.

The Markdown Preview tool provides a live side-by-side editor where you can write Markdown and instantly see the rendered HTML output. Markdown is a lightweight markup language created by John Gruber in 2004, now the standard for README files, documentation, blog posts, GitHub issues, Stack Overflow answers, and technical writing.

Our editor supports the core Markdown specification: headings (# H1 through ###### H6), bold (**text**), italic (*text*), strikethrough (~~text~~), code blocks (```), inline code (`code`), blockquotes (>), unordered lists (-), ordered lists (1.), links ([text](url)), and tables.

Markdown is used by GitHub, GitLab, Notion, Obsidian, Medium (partially), Dev.to, and virtually every developer tool. Learning Markdown is one of the highest-leverage technical writing skills — it renders beautifully, is version-control friendly, and can be converted to HTML, PDF, DOCX, and other formats.

How to use this utility

Use the controls below—paste text, pick files, or adjust options as described on the tool.
Click the main action button. Processing runs in your browser on this device.
Download or copy the output. Check the processing note for any external services used by this operation.

Common use cases

Writing GitHub README.md files with formatting and code examples
Drafting technical documentation for software projects
Creating blog posts for platforms like Dev.to, Hashnode, or Medium
Taking structured notes in Notion, Obsidian, or Bear
Writing product documentation or wiki pages for Confluence or GitHub Wiki

Tips for best results

1Use GitHub-Flavored Markdown (GFM) for GitHub README — it adds task lists and table support
2Indent code blocks with 4 spaces or fence with ``` for syntax highlighting
3Add alt text to all images: ![Alt text](image-url) for accessibility
4Use --- (three hyphens) on a blank line to create a horizontal rule separator
5Export Markdown to PDF using Pandoc for professional documentation

Frequently asked questions

Is Konnect2Tools free?: Yes. These in-browser tools are completely free to use with no account required for core functionality.
Do my files leave my device?: Browser document operations run locally, except where the operation uses an external service, such as AI summarisation. Read the processing note before using sensitive inputs.
Is the Markdown Preview tool safe to use?: Local operations process document content on your device. External-service operations may send inputs as described in the processing note. Keep originals and inspect the output.
What is the difference between Markdown and HTML?: Markdown is a human-readable plain text format that converts to HTML. HTML is the rendered output. Markdown is easier to write and read, but HTML offers more control. Most Markdown parsers allow raw HTML inline — useful for complex formatting not supported by Markdown syntax.
How do I add syntax highlighting to code blocks?: Fence your code block with triple backticks and specify the language: ```javascript ... ```. Most Markdown renderers (GitHub, VS Code, Pandoc) use Prism or highlight.js to syntax-highlight the code based on the language identifier.
Can I use Markdown in WhatsApp or messaging apps?: WhatsApp, Telegram, and Slack have their own Markdown-like formatting but not full Markdown. WhatsApp: *bold*, _italic_, ~strikethrough~, ```monospace```. Slack: *bold*, _italic_, ~strike~, `code`. GitHub, Notion, Obsidian, and Dev.to support full standard Markdown.
How do I convert Markdown to PDF?: Use Pandoc (command-line): pandoc input.md -o output.pdf. For GitHub README PDFs, use a browser — open the rendered README and print to PDF. VS Code with the Markdown PDF extension is the easiest option for developers.

Continue with another utility in developer & data utilities.

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