MarkLens — Instant Markdown Renderer & Page Converter

Select Markdown text on any page — see a live rendered preview floating on the page. Or open the side panel to write your own.

MarkLens renders Markdown wherever you find it — no signup, no servers, everything runs locally in your browser. Preview Markdown on any page Select Markdown text, right-click, and choose Preview as Markdown. A floating popup shows the rendered result with tables, task lists, code highlighting, footnotes, and emoji. Prefer it docked? Switch the default mode to the side panel. Convert HTML to Markdown Select formatted content, right-click, and get clean Markdown source back — perfect for grabbing docs, READMEs, and articles into your notes. Full editor with live preview Open the side panel or a full tab for a split/edit/preview Markdown editor with syntax highlighting, line numbers, find & replace, optional Vim bindings, and synced scrolling. Drafts autosave locally so work survives a closed tab. Export anywhere Download your document as Markdown, a styled standalone HTML file, or print / save as PDF. Drag & drop .md, .txt, and .html files straight into the editor. Customizable appearance Choose from 22 built-in light and dark themes, including solid colors and gradients — with adjustable fonts, sizes, and a distraction-free Zen mode. Private by design No account. No analytics. No network requests. Your text never leaves your device.