MDX Validator
Check MDX for syntax errors
Validate MDX on every deploy
Jamdesk validates your MDX automatically — no broken docs. Learn more →
How to Validate MDX
Paste your MDX content into the editor and validation runs automatically. The validator checks for common issues: unclosed JSX tags, malformed frontmatter, unbalanced curly braces in expressions, and invalid Markdown syntax. Errors appear inline with line numbers and descriptions so you can find and fix problems quickly. The validator uses the same MDX compiler that documentation platforms use, so if your content passes validation here, it will compile correctly in your project.
Frequently Asked Questions
What errors does the validator catch?
The validator catches JSX syntax errors (unclosed tags, mismatched components), frontmatter issues (invalid YAML), expression errors (unbalanced braces), and Markdown problems (malformed links, broken references).
Does validation run automatically?
Yes. Validation runs as you type with a short debounce delay. You do not need to click a button — errors and warnings appear inline as you edit.
Is this the same as my build-time validator?
The validator uses the standard remark-mdx parser, which is the same parser used by most MDX build tools. If your content validates here, it should compile in your project.
Can I validate multiple files at once?
Currently the validator handles one MDX file at a time. Paste your content into the editor to validate it. Batch validation across a project is better handled by your build toolchain.