Openly

Read Markdown files as clean, formatted pages right in your browser. Free, no account, no ads, no tracking. • Opens .md files from your computer or the web, plus .mmd / .mermaid diagrams • Open a folder and switch files from the sidebar • Ctrl+K to search every file in the folder • Table of contents, light / dark theme • Code highlighting, math, Mermaid diagrams, task lists, alerts • Auto refresh while you edit Readmark only displays your files. It never changes or uploads them. To open local files: chrome://extensions → Readmark → Details → "Allow access to file URLs".