Downright opens ordinary Markdown files directly from the filesystem. It supports the extensions used by project documentation, coding-agent instructions, notebooks, and technical notes.
File extensions
.md, .markdown, .mdown, .mkd, .mdx, .mdc, .qmd, .rmd
Rendered document features
- CommonMark and GitHub-flavored Markdown structure.
- Headings, lists, block quotes, tables, links, images, and footnotes.
- Tasks and GitHub-style callouts.
- Fenced code blocks with native syntax highlighting.
- Math and Mermaid diagrams rendered in the document.
- Front matter and file-path references such as
Document.swift:42.
What stays unchanged
Rendering decorates the source text. Downright does not convert the file into a proprietary document database, silently normalize its bytes, or require a workspace before opening it.