Linter Standardizer (MD049 / MD050)Asterisks ↔ Underscores

Markdown Bold & Italic Emphasis Cleaner

Standardize bold (`**` vs `__`) and italic (`*` vs `_`) markdown formatting across entire documents. Fixes markdownlint MD049 and MD050 style violations while protecting code blocks.

Bold:

Italic:

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Original Markdown

Mixed emphasis syntaxRaw Markdown

# Mixed Emphasis Document

In this document, some words are written with **underscores for bold** while others use **asterisks for bold**.

Similarly, some text uses *underscores for italics* and some uses *asterisks for italics*.

Sometimes typos create **redundant quad asterisks** that clutter your source code.

```typescript
// Code blocks should not be modified:
const __secret__ = "**preserved**";
```

Passes MD049 / MD050 linter rules100% Client-Side

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Complete Guide & Overview

Standardize Bold & Italic Markdown Emphasis (** vs __, * vs _)

Normalize mixed bold and italic markers in Markdown documents to satisfy markdownlint rules MD049 (emphasis style) and MD050 (strong style). Cleans syntax while protecting code fences.

How to Use the Markdown Emphasis Cleaner

Paste Document

Input your Markdown file with mixed bold and italic markup.

Select Preferred Syntax

Choose whether you prefer Asterisks or Underscores for bold and italic styling.

Copy Clean Markdown

Click 'Copy Clean Doc' to use your normalized text in pull requests or CI pipelines.

Key Features & Capabilities

Linter Rule Compliance: Conforms to markdownlint MD049 and MD050 consistent emphasis standards.

Asterisk & Underscore Toggles: Choose your team's preferred style for bold (** or __) and italics (* or _).

Quadruple Asterisk Removal: Cleans accidental ****text**** typos down to proper double asterisks.

Code Fence Immunity: Protects snake_case variable names inside code blocks.

100% Client-Side: Runs securely inside your browser with zero network requests.

Pro Tips & Best Practices

•Most modern style guides (including Google and GitHub) recommend asterisks (**bold** and *italic*) for maximum portability across parsers.

Frequently Asked Questions

Why does markdownlint flag mixed emphasis?

Mixing asterisks (**bold**) and underscores (__bold__) in the same project looks sloppy and causes git diff inconsistencies. Linters enforce using one style across all files.

Are snake_case variable names affected?

Our regex engine enforces non-word boundary checks so variables like 'user_profile_id' in text are not mistakenly converted into italics.

Can I choose asterisks for bold but underscores for italics?

Yes! You can independently configure the bold selector and the italic selector to match your project's exact style guide.

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