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DevCodivo

Markdown Previewer

Write GitHub Flavored Markdown with instant live preview, word count and HTML export.

Runs in your browser, your data never leaves your deviceFree, no sign-up
Words: 99Characters: 609Reading time: 1 min
609 B
Rendered Preview

Welcome to DevCodivo Markdown Previewer

This is a live GitHub Flavored Markdown editor running 100% in your browser.

Features

  • Instant preview as you type
  • Code syntax blocks with language tags
  • Tables, blockquotes, lists, and links
  • Real-time word & character count

Code Example

function greet(name) {
  console.log(`Hello, ${name}!`);
}
greet("World");

Data Table

Tool Platform Status
JSON Formatter Browser Active
Markdown Preview Browser Active

Clean, private, zero-tracking tools for modern developers.

How it works

The DevCodivo Markdown Previewer continuously monitors your text input, lexing your document into structured blocks (headers, blockquotes, lists, tables, and fenced code blocks) and applying inline rules for emphasis, links, code, and strikethrough.

As you type, an optimized virtual DOM updates the preview pane with clean, semantic HTML while computing real-time word count, character count, and estimated reading time.

Features

  • Instant split-view editor with live GitHub Flavored Markdown preview
  • Real-time word count, character count, and reading time estimate
  • GFM table formatting, checkboxes, blockquotes, and code syntax blocks
  • One-click copy for Markdown source or generated HTML
  • Standalone .html file export and local .md file import
  • 100% private: runs entirely client-side without network requests

How to use

  1. Type or paste your Markdown in the left editor panel (or click Sample or Upload .md).
  2. View the live rendered document in the right preview panel.
  3. Check the top bar for word count, character count, and estimated reading duration.
  4. Click Copy HTML or Export HTML to export your formatted work.

Example

# Project Roadmap
- [x] Initial design specifications
- [x] Client-side parser engine
- [ ] Production rollout

> "Simplicity is prerequisite for reliability." – Edsger W. Dijkstra

Frequently asked questions

Is the Markdown parsed client-side?
Yes. All parsing and HTML rendering happens 100% inside your browser using a lightweight, secure parser. No drafts, notes, or documentation are ever uploaded to a remote server.
Does it support GitHub Flavored Markdown (GFM)?
Yes. It supports core GFM extensions including strikethrough (~~text~~), interactive task lists / checkboxes (- [x]), blockquotes, tables, fenced code blocks with language indicators, and auto-linked URLs.
How does the HTML export work?
Clicking 'Copy HTML' copies the clean HTML markup directly to your clipboard. 'Export HTML' downloads a complete standalone .html file styled with system fonts, ready for browser viewing or embedding into websites.
Is the rendered HTML sanitized against XSS?
Yes. Script tags, dangerous attributes, and inline event handlers are safely neutralized to prevent cross-site scripting (XSS) when previewing untrusted Markdown content.
Can I upload existing .md files?
Yes. Click 'Upload .md' to select any local Markdown or text file. It will be loaded immediately into the editor with instant rendering and real-time statistics.

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