# Markdown Link Checker Statically check Markdown links for format errors, broken anchors, and undefined references (no network requests) > Canonical page: https://elysiatools.com/en/tools/markdown-link-checker - **Category:** Development - **Keywords:** markdown, link, checker, validator, broken link, anchor, markdown link checker, validate links ## Overview The Markdown Link Checker is a static analysis tool designed to scan your Markdown documents for formatting errors, broken internal anchors, and undefined reference links without making any external network requests. ## Inputs - **Markdown Input** (textarea): Paste your Markdown with links to check... - **Check Level** (select) - **Report Format** (select) ## When to use - Before publishing documentation or blog posts to ensure all internal headers and reference links resolve correctly. - When refactoring large Markdown files and you need to verify that anchor links still match the updated headings. - During offline editing sessions where you want to validate link syntax and reference definitions without internet access. ## How it works - Paste your Markdown content into the input area. - Select your preferred check level, choosing between basic validation or strict validation for unused references and duplicate anchors. - Choose the output report format as either plain text or structured JSON. - Run the check to instantly view a detailed report highlighting syntax errors, missing targets, or broken anchors. ## Use cases - Validating README files and project documentation before committing changes to a repository. - Auditing long-form Markdown books or guides to clean up unused reference-style links. - Checking generated Markdown files from static site generators for broken internal cross-references. ## Frequently asked questions ### Does this tool check external HTTP URLs to see if they are online? No, this tool performs static analysis only and does not make network requests to verify external websites. ### What is the difference between basic and strict check levels? Basic level checks link formats and broken anchors, while strict level also flags unused reference definitions and duplicate anchors. ### Can it detect broken internal section links (anchors)? Yes, it parses headings to verify that internal anchor links like #section-name point to valid headings in the document. ### What formats can I export the validation report in? You can generate the validation report in either plain text format or structured JSON format. ### Does my Markdown data get uploaded to a server? No, the validation is performed entirely in your browser, keeping your document content private and secure. ## Related tools - [Batch URL Validator](https://elysiatools.com/en/tools/batch-url-validator): Validate multiple URLs at once with format checking and security analysis - [Batch Email Validator](https://elysiatools.com/en/tools/batch-email-validator): Validate multiple email addresses at once with format checking and basic quality analysis - [Batch Phone Validator](https://elysiatools.com/en/tools/batch-phone-validator): Validate and format multiple phone numbers at once with international format support - [UUID Validator](https://elysiatools.com/en/tools/uuid-validator): Validate UUID format, detect version, and analyze UUID structure including variant, timestamp, and node information - [Markdown Linter](https://elysiatools.com/en/tools/markdown-linter): Check Markdown for style issues: heading levels, code fences, list consistency, and more (zero-dependency rule engine) - [SSL Checker](https://elysiatools.com/en/tools/ssl-checker): Check SSL certificate information, validity, and security configuration - [Foreign Key Validator](https://elysiatools.com/en/tools/data-foreign-key-validator): Validate foreign key relationships between multiple datasets. Perfect for checking data integrity, finding orphaned records, and ensuring referential consistency across related tables. Features: - Validate foreign key relationships - Find orphaned records - Check referential integrity - Support multiple key formats - Cross-table validation - Missing key detection - Duplicate key analysis - Relationship mapping Common Use Cases: - Database integrity checks - Data migration validation - ETL process verification - Referential consistency checks - Data quality assurance - Relationship analysis - [Markdown Lint and Style Checker](https://elysiatools.com/en/tools/markdown-lint-style-checker): Lint Markdown against ~15 markdownlint rules plus 2 Chinese-typography rules, with line-located reports and one-click auto-fix of safe issues ## Samples - [Markdown Samples](https://elysiatools.com/en/samples/markdown-samples): Markdown format examples from simple to complex document structures - [Markdown Viewer Samples](https://elysiatools.com/en/samples/markdown-viewer-samples): Sample Markdown files for README preview, documentation rendering, and rich-text markup tests - [Markdown Slide Deck Samples](https://elysiatools.com/en/samples/md-slide-deck-to-pdf): Remark/Marp style Markdown slide decks for testing PDF export layouts - [PDF Samples](https://elysiatools.com/en/samples/pdf-samples): Generated PDF samples from tools dated 2026-02-01 to 2026-02-10 ## Related content - [Web Source Reuse and Publication Audit](https://elysiatools.com/en/hubs/web-source-link-and-metadata-audits): Extract source evidence, inspect links and assets, analyze metadata and query strings, and check RSS/Atom and robots.txt before reuse, migration, or release.