Markdown to Slack Converter
Paste Markdown and copy it so bold, links, lists and code stay formatted in Slack messages and canvases, or get mrkdwn for bots, webhooks and the API. Runs in your browser.
How to use this tool
- Paste your Markdown into the input box, or click "Load example".
- Choose where you are pasting: a Slack message, a Slack canvas, or a bot, webhook or API.
- Click the copy button above the preview.
- Paste into Slack with Ctrl+V (⌘V on a Mac). Formatting is kept.
Preview
Your converted text will appear here.
How the Markdown to Slack Converter works
Slack treats formatting differently depending on where you paste it, which is why Markdown that looks fine in a canvas can show up as raw asterisks in a chat message. The message box applies formatting from the toolbar, from shortcuts, or from pasted rich text, but it does not convert pasted markup characters. So for messages, the tool copies formatted text (HTML) to your clipboard, the same kind of content you get when copying from a web page or Google Docs. Slack keeps that formatting when you paste.
For canvases it also copies formatted text, but keeps headings (H1 to H3) and tables, because canvases support them and messages do not. In messages, headings become bold lines and each table row becomes a bold bullet with its other columns as sub-bullets in the form "Column: value", which stays readable on a phone.
For bots, incoming webhooks and the Slack API, it produces mrkdwn, Slack’s own markup: *bold*, _italic_, ~strikethrough~ and <https://example.com|links>. Fenced code blocks and inline code pass through untouched, bullets become •, and formatting nested inside other formatting, such as a bold word inside a link, converts correctly.
Everything runs in your browser. Nothing you paste is sent to a server.
When to use it
- Posting release notes, a changelog or a README section into a Slack channel.
- Sharing an answer from ChatGPT, Claude or Gemini in Slack without the formatting breaking.
- Turning Markdown meeting notes into a Slack canvas with proper headings.
- Writing the text for a Slack bot, incoming webhook or API message, which expects mrkdwn.
Tips
- If you see stray asterisks in a Slack message, you pasted mrkdwn text. Choose "Slack message" and copy again.
- Slack messages cannot show tables, so for messages each table row becomes a bold bullet with the other columns listed under it. Canvases keep real tables.
- Images in Markdown will not embed. Upload the image to Slack separately.
- If your browser blocks the copy button, select the preview with your mouse, copy it, and paste that into Slack.
Frequently asked questions
Why does my converted text work in a canvas but not in a chat message?
Canvases and messages handle pasted text differently. The message box does not turn pasted * and _ characters into formatting, so mrkdwn text shows up raw. Choose "Slack message" in the tool: it copies formatted text instead, which Slack keeps when you paste into a message.
What is Slack mrkdwn?
It is Slack’s own text-formatting syntax, used by bots, webhooks and the API. It looks like Markdown but differs in the details: one asterisk for bold instead of two, underscores for italic, one tilde for strikethrough and angle-bracket links in the form <url|text>.
Are code blocks changed?
No. Code blocks and inline code are kept exactly as written, and nothing inside them is formatted.
Does it support nested lists?
Yes. Nested bullet and numbered lists are kept in all three modes.
Is my text stored anywhere?
No. The conversion runs entirely in your browser.