Free Tool

Free Slack Message Formatter

A Slack message formatter lets you write and preview messages using Slack's mrkdwn syntax before sending them. See exactly how bold, italic, code blocks, links, and lists will render in Slack without leaving your browser.

Perfect for drafting team announcements, onboarding messages, support macros, and any Slack message where formatting matters.

Write & preview your Slack message

Type mrkdwn on the left and see a live Slack-style preview on the right. Use the toolbar to insert formatting quickly.

Slack preview

Your formatted message will appear here as you type...

Start typing to see your Slack message come to life.

Slack mrkdwn cheat sheet

Quick reference for all supported Slack formatting syntax.

*bold*Bold text
_italic_Italic text
~strikethrough~Strikethrough
`code`Inline code
```code block```Code block
> quoteBlockquote
• itemBullet list
1. itemNumbered list
<url|text>Hyperlink
:emoji:Emoji shortcode

How to use this tool

  1. 1

    Type or paste your Slack message into the editor using mrkdwn syntax.

  2. 2

    Watch the live preview panel to see how your message will render in Slack.

  3. 3

    Use the quick-insert buttons to add formatting without memorizing syntax.

  4. 4

    Copy the formatted mrkdwn text and paste it directly into Slack.

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Frequently asked questions

Common questions about Slack message formatting, mrkdwn syntax, and how this free tool works.

What is Slack mrkdwn formatting?

Slack mrkdwn is Slack's own markup language for formatting messages. It is similar to Markdown but uses slightly different syntax. For example, bold text uses single asterisks (*bold*), italic uses underscores (_italic_), and strikethrough uses tildes (~strikethrough~). It also supports code blocks, blockquotes, links, and lists.

How is Slack mrkdwn different from regular Markdown?

Slack mrkdwn differs from standard Markdown in several ways: bold uses single asterisks (*text*) instead of double, italic uses underscores (_text_) instead of asterisks, links use angle brackets with pipe separators (<url|text>), and there is no support for headers, images, or tables within messages.

Can I preview how my Slack message will look before sending?

Yes. This free tool provides a live preview of your Slack message as you type. The preview panel renders your mrkdwn syntax into formatted text so you can verify bold, italic, code blocks, links, and other formatting before pasting the message into Slack.

Does this tool send messages to Slack?

No. This tool runs entirely in your browser and does not connect to Slack or any external service. You write and preview your message here, then copy the raw mrkdwn text and paste it into Slack yourself.

What formatting options does Slack support?

Slack supports bold (*text*), italic (_text_), strikethrough (~text~), inline code (`code`), code blocks (```code```), blockquotes (> text), ordered lists (1. item), unordered lists (• item), and hyperlinks (<url|display text>). Emoji shortcodes like :wave: are also supported.