GitHub README Live Preview
Paste the contents of any readme.md file — including one from a sandbox path like sandbox:/readme.md — and see it rendered live as GitHub-styled Markdown.
Pre-loaded with a complete README skeleton — title, feature bullets, fenced install commands, usage code, and a contributing checklist — rendered exactly the way GitHub's dark theme will show it. Edit on the left, watch the right pane keep up on every keystroke; nothing you write leaves this tab.
runs 100% in your browser — your prose stays private
How to Preview a sandbox:/readme.md File
A browser cannot open an arbitrary readme.md file path or read a sandbox directory on its own — that is a privacy boundary, not a limit of this Markdown file preview. So the workflow is simple: copy the raw text out of the file and paste it into the editor for an instant rendered preview.
sandbox:/readme.mdRendering Local and Sandbox readme.md Paths
Whether your file lives at a local path like ./README.md or a virtual sandbox path like sandbox:/readme.md, the steps are identical: select all, copy, and paste the Markdown below. The preview re-renders on every keystroke, so you can tweak the source and re-check the output without saving a file or leaving the tab.
- 1Write markdownType or paste on the left — the macro buttons drop tables, code blocks, and tasks at your cursor.
- 2Watch it renderThe right pane re-renders on every keystroke in GitHub’s dark style, scroll-synced to the editor.
- 3Copy the HTMLWord and character counts update live; one click copies the rendered HTML markup.
Live preview — GitHub dark
Parsed and rendered entirely in this tab by a built-in sanitizing markdown engine — your prose is never sent anywhere. Tip: the rendered checkboxes are clickable and update the markdown source.