Online Tool Store
· 4 min read
3 Markdown Editor Tools, Compared Honestly
Manesh Jayawardhana
CIO & Co-founder
You’re writing a README, some documentation, or notes in Markdown, and you want to see the rendered result next to what you’re typing — without installing an editor extension.
Some browser Markdown editors add so much on top of the basics — diagrams, LaTeX math, multiple themes, cloud sync — that the simple side-by-side preview you actually wanted gets buried under a settings menu.
How to judge a Markdown editor tool
Updates live, side by side. The preview should render as you type, not on a manual refresh.
No signup for basic use. Cloud sync accounts are fine as an option; writing and previewing shouldn’t require one.
Exports what you need. At minimum, copying or downloading the raw Markdown or rendered HTML.
Doesn’t upload your draft. Notes and documentation are often unpublished — a tool that renders locally keeps them that way until you choose to save or export.
The comparison
| Tool | Best for | Free tier | Watch out |
|---|---|---|---|
| Dillinger | Cloud sync to GitHub, Drive, Dropbox | Free, no signup for basic use | Cloud sync features need an account |
| Markdown Viewer | Mermaid diagrams, LaTeX math, PDF export | Free, no signup | Notes that ads may still load on the page |
| Phoenix Code | Fully local, reader mode, PDF export | Free, no signup | WYSIWYG editing is a paid Pro feature |
| Markdown Editor | Fast side-by-side preview, word counts | Free, no signup | No diagrams, math, or cloud sync |
Facts checked August 2026; tools change their plans.
Dillinger
Dillinger renders Markdown to HTML in real time with synced scrolling between panes, and you can start writing immediately with no signup — accounts are only needed for cloud sync with GitHub, Dropbox, Google Drive, OneDrive, or Bitbucket. It exports raw Markdown, styled HTML, or PDF.
It isn’t for someone who wants a minimal tool — the cloud integrations and export options add surface area beyond a simple preview pane.
Markdown Viewer
Markdown Viewer processes documents locally in the browser and adds Mermaid diagrams, LaTeX math via KaTeX, syntax highlighting for 190+ languages, and export to Markdown, HTML, PDF, or PNG — all without signup.
It isn’t for someone who wants a completely ad-free page — the site notes that advertising may still load, even though document processing itself stays local.
Phoenix Code
Phoenix Code’s Markdown editing, live preview, and reader mode are free with no account required, and nothing is uploaded to a server in either the browser or desktop version — your file stays on your machine.
It isn’t for someone who wants WYSIWYG-style editing — that feature specifically requires the paid Phoenix Pro tier, though live preview itself remains free.
Markdown Editor
Our editor gives you Markdown on one side and a live rendered preview on the other, updated as you type, with word and character counts and a copy or download of the HTML — all in your browser.
A real limitation: there’s no support for diagrams, math notation, or cloud sync — it’s built for straightforward Markdown writing, not an extended feature set.
Which one to pick
If you want a fast, no-frills side-by-side preview with word counts, use our Markdown Editor.
If you want to sync your draft to GitHub or cloud storage, use Dillinger.
If you need diagrams or math notation rendered alongside your text, use Markdown Viewer.
If privacy matters most and you want a guaranteed fully local editor, use Phoenix Code.
How to do it with Markdown Editor
- Open the Markdown Editor.
- Write Markdown in the left pane and watch the rendered preview update on the right.
- Copy or download the rendered HTML when you’re done.
Browse the full tools directory for more free, browser-based writing tools.
You might also need
If you’re starting from HTML instead of writing Markdown from scratch, our HTML to Markdown tool converts pasted HTML into tidy Markdown with headings, lists, links, and code preserved.
Frequently asked questions
Is there a free Markdown editor that doesn’t need an account?
Yes. Our Markdown Editor and all three alternatives here let you write and preview Markdown without creating an account — accounts, where offered, are only for extras like cloud sync.
What’s the difference between Markdown and rendered HTML?
Markdown is a lightweight plain-text syntax for formatting — using symbols like # for headings or **bold** for emphasis — that gets converted into HTML for display. The original Markdown specification was designed to be readable even before conversion.
Can I use Markdown for a GitHub README?
Yes, GitHub renders Markdown natively for README files, issues, and pull requests, using its own GitHub Flavored Markdown extensions like tables and task lists on top of standard Markdown syntax.
Final thought
For everyday Markdown writing, pick the editor that shows your rendered result the instant you type — save the diagram and math extras for the specific documents that actually need them.