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Markdown to Slack (mrkdwn) Converter

DeveloperText

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INPUT

Auto Process

OUTPUT

Client Side

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Guide

Markdown to Slack mrkdwn Converter

Paste standard Markdown and instantly get Slack-ready mrkdwn — the messaging app’s quirky variant where bold is a single asterisk, italics use underscores, and links are wrapped in angle brackets. The converter applies deterministic rewrite rules so headings collapse to bold, bullets switch to round dots, and code blocks stay untouched. Need to go the other way? Flip the direction toggle to translate Slack snippets back into clean GitHub-flavored Markdown.

How to Use

Pick the conversion direction first — Markdown to Slack mrkdwn for outbound posts, or Slack mrkdwn to Markdown when copying Slack threads into docs. Drop your text into the input box and the result appears live in the output panel. Tune the optional knobs to control how headings render, which bullet character is used, and whether to strip syntax Slack can’t display (images, tables, horizontal rules). Click the copy icon when you’re happy with the result.

Features

Bidirectional conversion – Toggle between Markdown to Slack and Slack to Markdown without leaving the page.
Code-aware – Inline backticks and fenced code blocks are masked during conversion, so asterisks and underscores inside code stay literal.
Configurable headings – Render # headings as bold (*Heading*), keep the original hashes, or strip them to plain text.
Bullet character control – Pick the bullet glyph Slack should use: •, -, or ·.
Strip unsupported elements – Optionally drop images, horizontal rules, and pipe-style tables that Slack can’t render.
Live output – Results refresh automatically as you type or change options.
100% client-side – Nothing leaves your browser; safe for internal messages and private docs.

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 FAQ

Why does Slack use mrkdwn instead of standard Markdown?

Slack predates the widespread CommonMark standard and was designed for short, conversational messages rather than long-form documents. Its mrkdwn flavor optimizes for the inputs people actually type into chat — single asterisks for emphasis, no heading levels, and angle-bracket links that survive Slack's automatic URL detection. The trade-off is loss of compatibility with Markdown viewers and editors, which is exactly the gap this converter bridges.
What is the difference between bold and italic syntax in Markdown vs Slack?

Standard Markdown uses double markers for bold (**bold**) and single markers for italic (*italic* or _italic_). Slack mrkdwn flips the convention: a single asterisk (*bold*) means bold and a single underscore (_italic_) means italic. There is no double-marker convention in Slack at all, which is why a naive paste from a Markdown doc into Slack ends up rendering as italic instead of bold.
How does Slack render links and why does it look different?

Slack uses the format <url|label> for hyperlinks, borrowed from the older IRC and XML-style markup traditions. The pipe character separates the destination URL from the display text. If you only want the URL to show, you can write <url> with no pipe. This format is parsed by Slack's message renderer before being displayed as a clickable link, replacing the more familiar [label](url) syntax from Markdown.
Can Slack render headings, tables, or images inline?

No. Slack mrkdwn is intentionally minimal — there are no heading levels, no inline images, and no table syntax in regular messages. To approximate a heading, authors typically use bold on a standalone line. For richer layouts, Slack offers Block Kit, a JSON-based UI framework used by apps and bots. Plain mrkdwn messages remain text-only by design to keep chat readable on mobile.
Why are conversion tools more reliable than asking an AI to rewrite text?

Format conversions like Markdown to Slack mrkdwn are governed by a small, fixed set of rewrite rules — perfect territory for regular expressions and string substitution. Deterministic tools always produce the same output for the same input, never hallucinate syntax, and never silently rewrite the meaning of your message. AI models, by contrast, may introduce subtle errors in code blocks, restructure your prose, or invent links that don't exist. For mechanical text transformations, a rule-based converter is the right tool.