Why this tool is useful
Check headings, lists, emphasis, links and inline code before publishing a short Markdown document.
Developer & Data · runs locally
Safe Markdown Preview
Render a focused Markdown subset as a live sanitized preview and copy the generated HTML without executing embedded code.
Ready. Your working data stays in this browser.
How it works
Raw HTML is escaped first, only a documented Markdown subset is converted, and the sanitized result is rendered inside the current page.
Practical example
Preview concise release notes and then copy the corresponding safe HTML fragment.
Validation
The calculation is deterministic and explains validation errors instead of silently changing invalid input.
Privacy boundary
Input and output remain in this tab. Copy and download happen through browser APIs without a server upload.
Result passport
Every run reports its tool mode, timestamp and input/output size so transformed data can be audited.