Tool usage guide

Learn when to use this tool, what it supports, and how real users apply it.

Key facts

Category: Development
Input types: textarea, select
Output type: text
Sample coverage: 4
API ready: Yes

Overview

The Markdown Linter is a zero-dependency rule engine designed to analyze your Markdown text for style issues, including inconsistent heading levels, unclosed code fences, and irregular list formatting.

When to use

Before committing documentation to a repository to ensure consistent styling.
When troubleshooting broken rendering in Markdown parsers caused by malformed list structures or heading levels.
To standardize formatting across multi-author technical blogs or documentation sites.

How it works

1Paste your Markdown content into the input text area.
2Select your preferred rule set (Standard, Relaxed, or Strict) and choose the output report format (Text or JSON).
3Run the linter to view the validation report highlighting style issues.

Use cases

Validating technical documentation files before publishing to a static site generator.
Auditing README files in open-source repositories for consistent heading hierarchies.
Checking automated Markdown reports generated by scripts for formatting errors.

Examples

1. Fixing Heading Hierarchies in API Docs

Technical Writer

Background

A technical writer is preparing API documentation but notices that some sections render incorrectly on the documentation portal.

Problem

The document contains skipped heading levels (e.g., H3 directly under H1) and inconsistent list markers.

How to use

Paste the API documentation Markdown into the input, select the 'Strict' rule set, set the report format to 'Text Report', and run the linter.

Rule Set: Strict, Report Format: Text

Outcome

The linter identifies the exact line numbers where heading levels skip and where list markers mismatch, allowing quick manual corrections.

2. Automating Readme Audits

DevOps Engineer

Background

A DevOps engineer wants to parse linting results programmatically to block commits with poorly formatted README files.

Problem

Manual reviews of README files are slow and prone to missing unclosed code blocks.

How to use

Paste the README content, select the 'Standard' rule set, and set the report format to 'JSON'.

FAQ

What rules does the linter check?

It checks heading levels, code fence closures, list consistency, and general Markdown style guidelines.

What is the difference between the Standard, Relaxed, and Strict rule sets?

Standard applies common style rules, Relaxed ignores minor formatting deviations, and Strict enforces rigid structural and spacing guidelines.

Can I export the linting report?

Yes, you can generate the report in either plain text or JSON format.

Does this tool modify my Markdown file?

No, it only analyzes the text and reports style issues without altering your original input.

Does the linter support external plugins?

No, it runs on a built-in, zero-dependency rule engine.

Rule Set: Standard, Report Format: JSON

Markdown Linter

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Learn when to use this tool, what it supports, and how real users apply it.

Key facts

Overview

When to use

How it works

Use cases

Examples

1. Fixing Heading Hierarchies in API Docs

2. Automating Readme Audits

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