Markdown Preview

Private live Markdown editor with math, diagrams and slides

by jigneshsanghani6

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Sep 26, 2026 Productivity

diagrams live-preview markdown editor math support private notes

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Markdown Preview is a free, private Markdown editor with a live preview. Everything stays on your device (IndexedDB), so there is no sign-up and no server storing your notes.Features:- GitHub Flavored Markdown, callouts, footnotes, frontmatter- KaTeX math and Mermaid diagrams- Syntax highlighting for 180+ languages- Present mode: turn any doc into slides with speaker notes- Open GitHub/GitLab files straight from a link- Tabs, outline, auto snapshots, custom CSS- Export to PDF, HTML or .md, or copy as rich text into Gmail, Docs or Slack- Installable PWA, works offlineFree, no tiers, no watermark.