What is an MD file?
An .md file is a plain-text document written with Markdown syntax. README files, technical notes, changelogs, and documentation often use it because the source stays readable in any text editor.
Open .md files locally
Open MD File Online
Select or drop a .md file to turn raw Markdown into a readable document. The source remains available beside the preview for quick checks and edits.
Local processing Free to use No install
120 words693 characters
Preview Browser only
Start typing or open a file to render a preview.
No file upload. The current source stays in this tab.
Open Markdown on any platform
Because the viewer runs in a modern browser, the same file can be checked on macOS, Windows, Linux, ChromeOS, or mobile without changing its contents or choosing a default desktop app.
Opening MD files FAQ
What program opens an MD file?
Any text editor can open the source. A Markdown viewer such as MDGlyph additionally renders headings, links, tables, code blocks, and supported diagrams.
Can I open an MD file without installing software?
Yes. Use the file button or drag the document into this browser workspace. Nothing needs to be installed or associated with the .md extension.
Will opening the file change it?
No. The viewer reads a local copy into the current tab. Edits in the workspace do not overwrite the original file unless you explicitly download a new export.