How to open a Markdown file online
Three steps, a few seconds, no software.
Open your .MDX file
Drop it on the box, choose it from your device, or paste the text straight in.
View it rendered
Your .MDX file opens formatted, with headings, lists, tables and code all in place.
Read, edit or export
Browse with the table of contents, tweak the text, then download HTML or save as PDF.
What is a .MDX file?
The plain-text way to write formatted documents.
An MDX file is DAEMON Tools' "Media Data eXtended" disc image, a single-file replacement for the older .mdf + .mds pair. Mount it with the free DAEMON Tools Lite and Windows treats it like an inserted CD/DVD, or convert it to ISO with AnyToISO for use on any platform.
Programs that open .MDX files
| Full name | Media Data eXtended image file (DAEMON Tools disc image) |
|---|---|
| Developer | DT Soft |
| First released | DAEMON Tools .mdx, around 2009 (to replace the .mdf + .mds pair) |
| Category | Text & Code |
| MIME type | application/octet-stream |
Related viewers
Every viewer is free to use.
Frequently asked questions
Is my .MDX file uploaded?
No. Markdown is rendered for you.
Why don't my images show?
Images stored next to the .md file (like images/screenshot.png) aren't part of the file you opened, so we show a placeholder with the path. Images with a full web address (https://…) load normally.
Is it safe to open Markdown from strangers?
Yes. Markdown can contain raw HTML, so every rendered page is cleaned with DOMPurify: scripts, event handlers and dangerous links are removed before anything is shown.
Can I edit the Markdown?
Yes. In Split or Source view the left pane is editable and the preview updates as you type. Download the edited .md when you're done.
How do I make a PDF?
Click Print / PDF and choose Save as PDF in the print dialog. Only the rendered document is printed, without the page around it.
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