What does the Safe Markdown Preview do?
Use this tool when you need a browser utility that renders Markdown into a readable preview while keeping raw HTML disabled. It accepts CommonMark-style Markdown text and returns a live rendered preview whose text can be copied. Results are deterministic for the same input except where cryptographic randomness, current time, or a live provider response is part of the task.
Safe preview does not mean every link is trusted
Disabling raw HTML prevents embedded tags and scripts from executing in this preview. Still inspect destinations before opening links, and sanitize generated HTML again if it will be published elsewhere.
How do you use it?
- Enter CommonMark-style Markdown in Markdown source or load the sample.
- Inspect the Safe preview as headings, lists, links, emphasis, and code fences render immediately.
- Copy the preview’s visible plain text when needed; this page does not export or execute raw HTML.
Worked example
Render a heading and emphasized status
Input
## Build status
**Ready** for review.Output
Build status
Ready for review.The preview presents the heading and bold text visually; Copy returns the visible text rather than generated HTML source.
Common errors and fixes
| Symptom | Likely cause | Fix |
|---|---|---|
| An HTML tag appears as text instead of rendering. | Raw HTML is deliberately disabled. | Express the content in Markdown or use a separately sanitized HTML workflow. |
| Markdown renders differently in another product. | Markdown implementations add different extensions and parsing rules. | Test the source in the final target and limit content to features both implementations support. |
Important behavior of Markdown Preview
The preview intentionally disables raw HTML and does not execute embedded scripts.
Standards and implementation references
- CommonMark specification (opens in a new tab)Defines the core Markdown syntax used as the compatibility baseline.
- markdown-it official repository (opens in a new tab)Documents the renderer used with raw HTML disabled on this page.
Frequently asked questions about Markdown Preview
Does the Markdown Preview upload my input?
No. Processing runs in the current browser tab, and the page does not send tool input to a KitLumi processing endpoint.
What input does the Markdown Preview accept?
It accepts CommonMark-style Markdown text. The workspace checks the input and reports malformed or unsupported values before it produces a result.
What does the Markdown Preview produce?
It produces a live rendered preview whose text can be copied. Copy and download controls appear when the output format supports them.
What limitation should I know?
The preview intentionally disables raw HTML and does not execute embedded scripts.
What changed?
Added Live Markdown rendering, Raw HTML disabled, Link detection, Code fences, responsive controls, explicit runtime disclosure, and tested browser output.