Markdown Preview — How to Use It Online for Free
Markdown Preview lets you write in Markdown and watch the formatted result build live beside it — headings, bold, lists, quotes and code — then copy the HTML. It is the fastest way to learn Markdown and to prepare text for blogs, GitHub and documents.
Markdown's bargain is simple: a few symbols (## for headings, ** for bold, - for lists) in exchange for clean, formatted output everywhere. The live preview removes the guesswork while learning — type, see, adjust. Copying the HTML output is handy when a platform accepts HTML but not Markdown itself.
How to use the Markdown Preview
- Type or paste Markdown in the editor box.
- Watch the live preview form beside it as you type.
- Fix anything that does not render the way you meant.
- Copy the HTML (or your Markdown) for where it is going.
A quick example
You are writing your project's README. Draft it here — title, feature list, a code block — check the preview looks right, and paste it into GitHub with confidence.
Tips for better results
- Leave a blank line between paragraphs and before lists — most rendering surprises come from missing blank lines.
- Preview long documents in sections; a single broken line can affect everything below it.
- Keep the Markdown source saved even when you copy HTML — the source is what you will edit later.
Working with plain text
Plain text is the most portable format there is — it pastes into forms, documents, code and messages without carrying hidden formatting with it. Most text trouble comes from invisible things: double spaces, stray blank lines, trailing spaces, and encoding quirks picked up when text is copied from PDFs and web pages. The workflow that fixes almost anything is: clean first (remove extra spaces and duplicates), then transform (case, sorting, find-and-replace), then measure (word count). Because every tool here works on a pasted copy in your browser, you can experiment freely — your original document is never at risk, and nothing you paste leaves your device.
Common questions
I wrote a heading but it shows as normal text. Why? Markdown is picky about two things: the # must be at the very start of the line, and there must be a space after it — '# Heading' works, '#Heading' does not. The live preview makes such slips easy to spot and fix.
Where is Markdown actually used? GitHub READMEs, many blogs and note apps, Reddit and Discord messages, documentation, and increasingly AI chat tools. A little Markdown skill pays off in all of them.
Do I need to sign up or install anything? No. The Markdown Preview is completely free, needs no account and nothing to install — it runs in your browser, and anything you type stays on your device.
One tool rarely finishes the whole job. The natural companions to this one are covered in the Word Counter guide and the Case Converter guide — between them, most text tasks can be handled end to end in the browser, with no installs and no accounts.