About this tool
When you are writing Markdown, there is no way to know whether a heading level or a table is right until you actually render it. This tool renders whatever is in the left-hand editor immediately on the right, with no save step and no build in between, so a README or a set of meeting notes takes shape as you write it.
It supports CommonMark plus the GitHub Flavored Markdown extensions — tables, task lists, strikethrough and automatic links — which covers the notation people actually use in real documents.
Parsing happens in your browser, and the generated HTML is sanitized before it is displayed, so you can safely preview a document that contains scripts or unexpected markup.
How to use it
- Type Markdown into the left-hand editor, or paste an existing document.
- The preview on the right updates as you type — there is no convert button to press.
- Drag the divider in the middle to change how much space the editor and preview get.
- Your text is saved in the browser automatically, so you can close the tab and come back later.
Features
Renders as you type
The preview updates on every keystroke. No conversion step, no waiting.
GitHub-flavoured Markdown
Tables, task lists, strikethrough and autolinks all render the way they do on GitHub.
Safe rendering
The HTML is sanitized before display, so scripts in a pasted document cannot run.
Resizable and persistent
Pane widths and your text are stored locally and restored on your next visit.
Frequently asked questions
Where is my Markdown stored?
Only in your browser's local storage. It is never uploaded, and it is not shared with your other devices.
Are tables and checkboxes supported?
Yes. GitHub Flavored Markdown is enabled, so pipe tables and `- [ ]` task lists render as expected.
Can I write raw HTML?
Basic formatting tags render, but executable elements and attributes such as `script` and `onclick` are stripped for safety.
Can I print or export the preview?
Use your browser's print function. The preview pane is laid out for readable printed output.