Markdown Viewer

I built Markdown Viewer because my Markdown workflow was more fragmented than it should have been.

A basic preview is easy to find. The problems start when a document contains code, equations, diagrams, tables, or task lists—and when the final result needs to become a PDF, an HTML page, or an image. I kept running into tools that handled only one part of that process. Some required an account before I could test them, while others were fine for simple text but stopped being useful for technical documents.

So I started building the tool I wanted to use: a Markdown workspace that opens immediately, gives an accurate live preview, and turns a draft into something shareable without making the user assemble several separate tools.

What Markdown Viewer does

Markdown Viewer is a free, browser-based Markdown editor with a split-screen writing and preview experience.

It currently supports:

- GitHub Flavored Markdown, including tables and task lists

- Syntax highlighting for more than 190 programming languages

- LaTeX equations

- Mermaid diagrams with fullscreen viewing

- Multiple document tabs and local auto-save

- Drag-and-drop Markdown import

- Export to Markdown, standalone HTML, PDF, or PNG

- Separate Mermaid export to PNG or SVG

- Compressed share links that carry the document in the URL

No account or software installation is required. Core editing and export happen in the browser, and documents are not uploaded for storage.

You can try it here: https://markdownviewer.org/

Who I am building it for

The main users I have in mind are developers checking README files and documentation, technical writers preparing articles, students writing notes with formulas or code, researchers working with structured drafts, and bloggers moving Markdown into a CMS.

Their use cases are different, but the underlying job is similar: write in Markdown, confirm that every technical element renders correctly, and produce a result that can be published or shared.

The four benefits I am optimizing for

1. Catch problems while writing

The preview updates as the document changes, so broken tables, code blocks, formulas, and diagrams become visible before publication. The goal is to shorten the feedback loop between typing Markdown and seeing the real output.

2. Keep the entire workflow in one place

Writing, technical rendering, diagram review, and file export happen in the same workspace. A user should not need one tool for preview, another for Mermaid, and another to create a PDF.

3. Remove setup from small but important jobs

For a quick README check or a one-off conversion, creating an account and configuring a workspace adds more effort than the task itself. Markdown Viewer opens directly into the editor, so users can start immediately.

4. Give users control over unfinished work

Drafts often contain internal notes, unpublished ideas, or sensitive technical details. Browser-based editing, local auto-save, and no document storage let users work without first sending every draft to a document database.

Why I think this is more than a nice-to-have

Markdown is often part of a delivery workflow, not just a writing preference. A formatting error in documentation, a broken diagram, or a poor PDF export creates real rework. The product becomes valuable when it helps someone verify a document and create the deliverable in the same session.

The three most immediate outcomes are simple:

1. See a polished preview while typing.

2. Render code, equations, and diagrams without opening another tool.

3. Download a shareable Markdown, HTML, PDF, or PNG file immediately.

What I am trying to learn next

I am now deciding where to focus the next round of improvements. The main possibilities are better performance for long documents, more keyboard-driven editing, higher export fidelity, and smoother workflows for moving content into publishing platforms.

I would really value feedback from people who regularly work with Markdown:

• What is the one feature that makes a Markdown editor indispensable for you?

• Where does your current Markdown-to-publishing workflow break down?

• Which export format do you rely on most?

If you try Markdown Viewer, please share the document type you tested and anything that did not render or export as expected. Specific examples would be especially helpful.