Online Markdown Viewer with HTML Preview 作成者: mdapp leadtech

Usable Online Markdown Viewer with HTML Preview helps you view markdown online, open .md files, and turn web pages into clean markdown directly in Firefox. It removes ads, sidebars, and clutter while preserving headings, lists, tables, links, and clean, readable structure. Use it to extract full articles, selected text, AI chats, and convert YouTube transcripts into a cleaner format that is easier to read and reuse. TOC checkboxes help you select sections before copy, print, or save.

Use this online markdown viewer from the toolbar or right-click menu and open the result in a convenient side panel. It works with full pages, selected parts of a page, local .md files, and structured browser-based reading workflows, with Mermaid and KaTeX support for technical content.

🔹 Clean reading for the web
Our Online Markdown Viewer with HTML Preview is built to make busy sites easier to use:
🔺 remove banners, menus, and clutter
🔺 keep titles, code blocks, tables, and links intact
🔺 make articles, guides, and notes easier to scan or navigate with TOC
🔺 focus on the main text instead of heavy layout

🔹 Useful for AI chat extraction
This feature helps turn long AI conversations into cleaner, reusable text:
📌 extract chats from ChatGPT
📌 extract chats from Gemini
📌 extract chats from Claude
📌 extract chats from Copilot
📌 extract chats from Grok
It is useful for saving prompts, answers, notes, and research conversations in a more readable format for reuse, printing, or export.

🔹 HTML preview when you want a rendered view
Switch between markdown view and HTML preview as needed.
➤ open an entire web page in your browser
➤ convert only a selected part
➤ read the result as markdown
➤ preview the rendered version in clean HTML before saving or printing
That makes the extension useful when you want both a markdown viewer and a practical markdown to html workflow in one place.

🔹 Open files and read them in the browser
The extension also works well with local .md files and browser-based reading:
📂 open .md files from your computer
📂 convert html files opened in your browser into a markdown view in the side panel
📂 view markdown online without distracting page clutter
📂 use search, TOC, and TOC checkboxes to select sections for copy, save or print

🔹 Save output the way you need it
Different tasks call for different formats. You can:
💾 copy markdown to the clipboard
💾 copy rendered HTML
💾 save as .md
💾 save as .htm
💾 print directly or save as PDF using browser or operating system print options.
This is useful for research notes, documentation, reference material, study content, and offline use in Firefox.

🔹 Built for structured and technical material
This markdown viewer extension supports features that are especially useful on more advanced documents:
🧩 Mermaid light support for diagrams
🧩 KaTeX support for math notation
🧩 GitHub-style document rendering
🧩 better readability for technical documentation and other structured text

🔹 Useful for transcript, chat, and productivity workflows
Some material is harder to reuse in its original form. This tool helps by letting you:
📌 extract YouTube transcripts when they are available on the page
📌 save transcript output with timestamp and source references
📌 capture selected AI chat text from the right-click menu
📌 reuse converted content in Obsidian or Notion markdown flows
📌 keep consistent formatting across notes and projects
📌 convert html pages to md files for use in tools such as Jupyter notebooks or GitHub Gist pages.
It gives you a simple html to markdown workflow for turning cluttered pages into reusable text.

🔹 Practical for everyday browser work
This online markdown viewer is a good fit for several common situations:
🌟 developers reading technical documentation
🌟 writers saving online articles as structured text
🌟 students collecting study notes and transcript material
🌟 researchers simplifying cluttered sites
🌟 anyone who wants markdown view, HTML preview, TOC, search, and print in one extension

🔹 Privacy-friendly and lightweight
✅ no tracking of browsing activity
✅ no account required
✅ works directly in your browser
✅ focused permissions for local use and export workflows

🔹 Frequently asked questions
❓ Can I convert only part of a page?
💡 Yes. Select a section and open only that fragment in the viewer.
❓ Can I open local .md files?
💡 Yes. You can open .md files and view them with HTML preview when needed.
❓ Can I save the result?
💡 Yes. Save as .md or save the rendered result as .htm.
❓ Does it support technical documents?
💡 Yes. It supports Mermaid light, KaTeX, TOC, search, text size controls, and print functions.
❓ Can it extract YouTube transcripts?
💡 Yes. When a transcript is available, it can be captured as structured text.

Online Markdown Viewer with HTML Preview is a practical markdown viewer extension for viewing, extracting, previewing, printing, and saving clean text from web pages and local .md files directly in Firefox.