Calculator
What the Markdown Previewer does
Markdown Previewer: calculates Status and HTML from Markdown. Example: the sample loaded on the page gives status Converted (basic markdown subset).
The Markdown Previewer turns Markdown into Status and HTML. Adjust anything and the figures re-derive on the spot.
Most people who open the Markdown Previewer are engineers checking an encoding. Pasting a production payload into an unknown web tool is a real risk, which is why this one stays local.
Nothing leaves the tab. You can watch your browser network panel while you use it and see for yourself.
Everything needed to verify a result is further down: the fields, the method and one fully worked example.
What do the Markdown Previewer fields mean?
The Markdown Previewer uses 1 input. A filled form means you can test one idea immediately instead of sourcing every input first.
| Field | What to enter | Default |
|---|---|---|
| Markdown | paste or type any amount of text | # Hello This is **bold** and *italic*. - one - two |
How does the Markdown Previewer work?
Each output is derived from the inputs above in a single pass; there is no hidden state carried between runs, so the same inputs always give the same calculation.
Inputs are validated before anything is computed, so a bad entry is reported rather than quietly producing a wrong answer.
Worked example
These are the values the Markdown Previewer loads by default, and the result it produces from them. Below is the same computation the tool performs on load, step by step.
| Markdown | # Hello This is **bold** and *italic*. - one - two |
|---|
| Status | Converted (basic markdown subset) |
|---|---|
| HTML | <h1>Hello</h1><br/><br/>This is <strong>bold</strong> and <em>italic</em>.<br/><br/><ul><li>one</li> <li>two</li></ul> |
How to use it
- Paste your content into Markdown.
- There is nothing to click. The answer keeps pace with your edits.
- Read Status and HTML in the results panel.
- Copy Link when you want to return to this exact configuration; Print when someone needs it on paper.
What this tool does not do
- Processing happens in your browser, so extremely large inputs are bounded by available memory.
- Output follows the common convention for this format; a specific toolchain may have its own house style.
- Where a standard has revisions, the version used is the one named in the method section.
Frequently asked questions
One thing: Markdown. Every box already holds a working value, so the form is usable immediately, without filling anything in first.
With the values loaded when the page opens, status comes out as Converted (basic markdown subset). Adjust any field to see how much the answer depends on it.
No. The work runs in JavaScript inside this page, so your values never leave your device. You can confirm it in your browser network tab.
No charge. Everything on the page is available without signing in.
It is exact within the stated method. Anything the method does not model is simply out of scope.