Markdown to Email: Gmail, Outlook, and Thunderbird Without Broken Formatting

If you searched for markdown to email, you probably want one simple thing: write the message in Markdown, then send it as a normal-looking email. Not a message full of ## headings, **bold**, and backticks.

The catch is that Gmail, Outlook, and Thunderbird do not treat Markdown like a Markdown editor. If you paste raw Markdown into the compose window, most email apps will send the raw characters. Your recipient sees the syntax instead of the formatting.

The reliable workflow is:

1. Write the email in Markdown.
2. Convert the Markdown to HTML or rich text.
3. Paste the rendered result into your email composer.
4. Send yourself a test before sending it to other people.

That sounds slightly annoying, but it is usually faster than fighting with the email editor.

Quick answer

Use Markdown to HTML when you need the HTML source or you are pasting into an email tool that accepts HTML.

Use Markdown to Rich Text when you want to copy the formatted result and paste it directly into Gmail, Outlook, Thunderbird, Google Docs, Notion, or another editor.

For most people writing a normal email, Markdown to Rich Text is the easiest route.

Why raw Markdown does not work in email

Markdown is a writing format. Email clients send formatted email as HTML behind the scenes.

So this Markdown:

## Project update

Hi Sam,

Here are the next steps:

- Review the draft
- Leave comments by Friday
- Confirm the launch date

Thanks,
Alex

does not magically become a formatted email in Gmail or Outlook. If you paste it raw, it usually stays raw.

You need to convert it first, then paste the formatted version.

How to paste Markdown into Gmail

For Gmail, the cleanest workflow is rich text:

1. Open copy Markdown as rich text.
2. Paste your Markdown into the input box.
3. Check the preview.
4. Copy the formatted output.
5. Paste it into the Gmail compose window.
6. Send a test email to yourself.

Gmail usually keeps basic formatting well: headings, bold text, italic text, links, bullets, numbered lists, and simple tables. Code blocks can be less predictable because email clients are not built for developer documentation.

If the email is going to customers, I would keep code blocks short or link to the full docs instead.

How to paste Markdown into Outlook email

Outlook is fussier than Gmail. It can change spacing, table borders, and code block styling after paste.

Use this workflow:

1. Convert the Markdown with the rich text paste workflow.
2. Paste into Outlook.
3. Click through the email before sending.
4. Check lists, tables, and links.
5. Send a test to yourself, then open it on desktop and mobile.

If Outlook damages the spacing, try the HTML route instead:

1. Convert with HTML source from Markdown.
2. Copy the HTML.
3. Paste it into the email tool or template editor that accepts HTML.

Regular Outlook compose windows are not always friendly to raw HTML paste. Newsletter tools, CRM email editors, and transactional email platforms usually handle HTML better.

How to use Markdown in Thunderbird

Thunderbird users often search for Markdown email because Thunderbird feels closer to a power-user tool. Still, the basic rule is the same: convert first.

For a normal message:

1. Convert Markdown to rich text.
2. Paste the formatted output into Thunderbird.
3. Review the message in the compose window.
4. Send a test email.

For a template or HTML email:

1. Convert Markdown to HTML.
2. Use the HTML in your template workflow.
3. Test the final email in the clients your recipients actually use.

Do not assume Thunderbird, Gmail, Apple Mail, and Outlook will render the same HTML in exactly the same way. Email HTML is older and more limited than web page HTML.

What works well

Markdown is a good fit for emails like:

• internal updates
• meeting notes
• product changelogs
• support replies
• lightweight newsletters
• developer notes
• onboarding instructions

These formats usually survive conversion well:

• headings
• paragraphs
• bold and italic text
• links
• bullet lists
• numbered lists
• blockquotes
• simple tables

What needs extra checking

Email clients can be surprisingly rough with formatting. Before sending an important email, check:

• whether links are clickable
• whether bullet indentation still looks right
• whether tables fit on mobile
• whether code blocks are readable
• whether long URLs wrap badly
• whether images, if any, load correctly

If the email is important, send it to yourself first. That one-minute check catches most formatting mistakes.

Markdown to email example

Start with this Markdown:

## Launch checklist

Hi team,

Please review these items before Thursday:

1. Confirm the final copy
2. Check the pricing page
3. Test the signup flow

Reference: [launch notes](https://example.com)

Thanks,
Mina

After conversion, your email should look like a clean message with a heading, numbered list, and clickable link. The recipient should not see Markdown syntax.

That is the whole point of a Markdown to email workflow: write fast in Markdown, send clean email.

Should you use HTML or rich text?

Use rich text when you are pasting into Gmail, Outlook, Thunderbird, Google Docs, or a normal editor.

Use HTML when you are building a newsletter, CRM template, transactional email, or anything that has an HTML editor.

If you are not sure, start with rich text. It is usually closer to what people expect when they say "I want to paste Markdown into email."

FAQ

Can Gmail convert Markdown to formatted email by itself?

Not reliably. Gmail's compose window does not behave like a Markdown editor. Convert Markdown to rich text first, then paste the formatted result.

How do I paste Markdown into Outlook email?

Convert the Markdown to rich text, paste it into Outlook, then send yourself a test. Outlook can change spacing, so check the final message before sending it to other people.

Is Markdown to email the same as Markdown to HTML?

Not exactly. Markdown to HTML gives you HTML code. Markdown to email usually means you want a formatted email body. For normal email writing, Markdown to Rich Text is often easier.

Can I use Markdown for email newsletters?

Yes, but convert it to HTML and test the final newsletter. Newsletter tools and email clients can handle HTML differently, especially for tables, spacing, and code blocks.