A Markdown Viewer for Diagrams and Math
Built for reading and sharing AI-generated Markdown in the LLM era.
Markdown is everywhere. Viewing it shouldn't be annoying.
Most "markdown viewer online" tools are actually editors, formatters, or SEO utilities. You just want to open Markdown and read it — rendered, clean, and comfortable.
Raw .md opens as plain text
Editor UIs are distracting
Long docs are painful to navigate
Sharing/printing is harder than it should be
A markdown viewer online built for reading
Not an editor pretending to be a viewer.
Viewer-first by default
- Opens in rendered view immediately
- No IDE clutter, no split pane required
- Optional Focus mode for distraction-free reading
Open Markdown from anywhere
- Upload or drag & drop local .md files
- Paste Markdown and render instantly
Better for long Markdown documents
- Auto table of contents from headings
- Reader controls: font size and line width
- Smooth scrolling and fast rendering
Markdown rendering you can trust
- CommonMark + GFM (tables, task lists, fenced code)
- Syntax highlighting for code blocks
Why mdview.io is different
If you searched for a markdown viewer online, you probably wanted a viewer.
| mdview.io | Typical online tools | |
|---|---|---|
| Viewer-first (read mode by default) | ||
| Minimal, reader-friendly UI | ||
| Great for long docs (TOC + reading controls) | ||
| Handles 10MB+ files without slowdowns | ||
| Open local files | ||
| Share URL | ||
| Print-friendly + PDF export |
"If you want to write Markdown, great editors already exist.
If you want to read Markdown, mdview.io is the tool."
Features (the ones you'll actually use)
Everything you need, nothing you don't.
Markdown viewer online (CommonMark + GFM)
Table of contents (toggleable)
Light / Dark / Sepia themes
Reader controls (font size, line width)
Handles 10MB+ files smoothly
Advanced rendering (optional)
- Mermaid diagram rendering (toggleable)
- LaTeX math rendering (toggleable)
- Frontmatter parsing + display (toggleable)
Mermaid diagrams in Markdown
Drop Markdown with Mermaid code fences and mdview.io renders it instantly. Support includes flowcharts, sequence diagrams, Gantt charts, ER diagrams, class diagrams, and mindmaps.
LaTeX formulas in Markdown
Markdown file viewer with LaTeX formulas
Render inline and block math instantly. mdview.io supports fractions, integrals, summations, matrices, aligned equations, and complex formulas for technical docs.
Use cases
Render AI-generated Markdown with diagrams
Perfect for reading LLM responses that include complex Mermaid diagrams, LaTeX math, and formatted technical specs.
Share documents as clean, readable links
Paste your Markdown and share it with others as a beautifully rendered, distraction-free web page.
Export technical Markdown to PDF or PNG
Generate clean, professional PDFs or high-quality images of your rendered Markdown for presentations and documentation.
Open Markdown from the terminal
Add a shell function to view any .md file in your browser instantly.
Add to your ~/.bashrc or ~/.zshrc:
mvd() { xdg-open "https://mdview.io/#mvd=zip:$(zip -q -j - "$1" | base64 -w0)"; }Usage: mvd README.md
Add to your ~/.zshrc or ~/.bash_profile:
mvd() { open "https://mdview.io/#mvd=zip:$(zip -q -j - "$1" | base64)"; }Usage: mvd README.md
Add to your PowerShell profile ($PROFILE):
function mvd { param($file); $zip = [System.IO.Path]::GetTempFileName() + ".zip"; Compress-Archive -Path $file -DestinationPath $zip -Force; $b64 = [Convert]::ToBase64String([IO.File]::ReadAllBytes($zip)); Remove-Item $zip; Start-Process "https://mdview.io/#mvd=zip:$b64" }Usage: mvd README.md
Try the markdown viewer online now
FAQ
Is mdview.io an editor?
No — it's a markdown viewer online. It's optimized for reading first.
Does it support GitHub-flavored Markdown?
Yes: tables, task lists, fenced code blocks, and more.
Can I open local .md files?
Yes — upload or drag & drop.
Can I print or export to PDF?
Yes — it's designed to be print-friendly.