When the Markdown Previewer seems to misbehave, the cause is usually one of two things: something stopped the tool from running, or it ran but the result is not usable. This guide starts with the fastest checks, then walks through the common problems and exact fixes.
Quick Checks First
- Refresh the page - a stalled session is the most common cause of nothing happening.
- Confirm the input is not empty and actually contains what you meant to submit.
- Try the smallest possible input; if that works, the issue is size, not the tool.
- Turn off browser extensions that block scripts, then reload and test again.
- Update or switch browsers if the problem repeats across sessions.
Common Problems and How to Fix Them
My list will not render.
Single line breaks do not create list items - add a blank line before the list starts.
The preview differs from my live site.
Themes add their own CSS - the preview shows structure, not your site design.
Code blocks show as plain text.
Fence them with triple backticks and leave a blank line above so the renderer detects the block.
My links and images do not appear.
Check the syntax - brackets for the label, parentheses for the URL and no spaces between them.
Tables stay as plain rows.
Add the separator row of dashes under the header - without it the table is treated as text.
The rendered HTML differs from my generator.
Markdown flavours disagree on edge cases - validate the final HTML in your own pipeline if exact output matters.
When It Works but the Output Is Poor
If the tool runs fine but the result misses, the problem is almost always the brief, not the software:
- Assuming preview equals site styling
- Forgetting blank lines between blocks
- Mixing markdown flavours
- Editing the rendered HTML instead of source
How to Stop It Happening Next Time
- Keep a saved prompt template for every task you repeat.
- Change one setting per generation so causes stay obvious.
- Run a two-minute sanity test with known input after any update.
- Note every failure and its fix; a short troubleshooting log pays for itself.
Still Stuck?
Reproduce the problem with the smallest possible input and note the exact steps that triggered it. A one-line description of what you did, what you expected and what happened is enough to get a precise answer from support or a colleague.
Frequently Asked Questions
Which markdown features are supported?
Headings, lists, links, images, code blocks, quotes and tables all render in the preview.
Does it show my site CSS?
No - the preview shows structure with neutral styling, and your theme applies after publishing.
Is the HTML output available?
Yes - the rendered result maps directly to the HTML your generator will produce.
Is my markdown stored?
No - rendering happens in your browser as you type.
Related Guides
- Markdown Previewer - free online tool
- How to Use Markdown Previewer
- What Is a Markdown Previewer and How Does It Work?
- Markdown Previewer Examples: Real Scenarios and Results
- Markdown Previewer for Software Engineers and DevOps Teams
- Best Markdown Previewer Alternatives Worth Trying
- Markdown Previewer Tips and Best Practices
- Is Markdown Previewer Safe? Free vs Paid
- More code tools and guides