# ShowDev: I built a bulk HTML-to-Markdown converter that runs entirely in the browser

> Source: <https://dev.to/cdieck88/showdev-i-built-a-bulk-html-to-markdown-converter-that-runs-entirely-in-the-browser-3p3e>
> Published: 2026-08-11 18:52:10+00:00

Most HTML-to-Markdown tools handle one file at a time. You paste some HTML, get Markdown back, repeat. That works for a quick snippet but not when you have 200+ pages from a help center export sitting in a folder.

I needed exactly that. I had a full site mirror (grabbed with `wget --mirror`

) and wanted clean Markdown I could feed into an LLM knowledge base. Nothing I found could handle it without uploading files to a server or converting one by one.

So I built [HTML to Markdown AI](https://www.html-to-markdown-ai.com).

No server involved. Your files never leave your machine.

The heavy lifting happens in Go/WASM. The pipeline:

Intentional decision. Downloading HTML from someone else's site has legal implications depending on jurisdiction and terms of service. I don't want to be in that business.

Downloading is also the easy part:

```
wget -r -l 0 -np -k -E -p -e robots=off \
  --reject-regex '\.(png|jpe?g|gif|svg|webp|woff2?|ttf|css|js|zip|pdf)$' \
  -w 0.5 --random-wait \
  https://docs.example.com/
```

That gives you a local folder with all the HTML. The hard and annoying part is turning that into clean, usable Markdown. That's what this tool solves.

[https://www.html-to-markdown-ai.com](https://www.html-to-markdown-ai.com)

Use cases I've tested it with:

If you work with LLMs and regularly need to get web content into a format they can digest, this might save you some time.

Feedback welcome. What would make this more useful for your workflow?