# Fetching And Converting Urls

> Use when fetching a live URL and converting it to Markdown. Covers --url, custom user agents, preprocessing for noisy pages, and the --json ConversionResult shape.

- Skill: `kreuzberg-dev/fetching-and-converting-urls` (Agent Skill)
- Install (CLI): `npx skillmds@latest add kreuzberg-dev/fetching-and-converting-urls`
- Raw SKILL.md: https://api.skillmd.com/api/skills/kreuzberg-dev/fetching-and-converting-urls/raw
- Safety review: pending
- Works with: Claude Code, Claude.ai, OpenAI Codex
- Category: Web & Frontend, Docs & Writing
- Author: kreuzberg-dev (https://skillmd.com/u/kreuzberg-dev)
- Updated: 2026-09-10
- Page: https://skillmd.com/skills/kreuzberg-dev/fetching-and-converting-urls

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# Fetching and converting URLs

Use this when the user gives a URL instead of HTML and wants the page as
Markdown (or its metadata/tables). The CLI fetches the page over HTTP and
converts it in one step via `--url`. `--url` conflicts with a positional `FILE`.

For crawling *many* pages or following links, use `crawlberg` instead — this
skill is for a single URL.

## Fetch and convert

```bash
# Fetch a URL, print Markdown to stdout
html-to-markdown --url https://example.com

# Save to a file
html-to-markdown --url https://example.com -o page.md

# Custom User-Agent (default mimics a real browser)
html-to-markdown --url https://example.com --user-agent "MyBot/1.0"
```

`--user-agent` requires `--url`.

## Clean noisy pages

Real web pages carry navigation, ads, cookie banners, and forms. Preprocess
before converting:

```bash
html-to-markdown --url https://example.com/article --preprocess --preset aggressive

# Keep the nav or forms if the page content lives there
html-to-markdown --url https://example.com --preprocess --keep-navigation
```

Presets: `minimal`, `standard` (default), `aggressive`. `--preset` and the
`--keep-*` flags require `--preprocess`.

## JSON output (ConversionResult)

Add `--json` to get the full structured result instead of plain Markdown:

```bash
html-to-markdown --url https://example.com --json
```

```json
{
  "content": "# Title\n\nContent\n",
  "metadata": {
    "document": { "title": "...", "language": "en" },
    "headers": [],
    "links": [],
    "images": [],
    "structured_data": []
  },
  "tables": [],
  "images": [],
  "warnings": []
}
```

Useful combinations (all require `--json`):

```bash
# Page title + outline, no Markdown body
html-to-markdown --url https://example.com --json --no-content \
  | jq '{title: .metadata.document.title, headings: [.metadata.headers[].text]}'

# Include the document-structure tree
html-to-markdown --url https://example.com --json --include-structure | jq '.document'

# Extract inline image data
html-to-markdown --url https://example.com --json --extract-inline-images | jq '.images | length'
```

## Surface warnings

```bash
html-to-markdown --url https://example.com --show-warnings > page.md
# non-fatal warnings (truncation, malformed markup) go to stderr
```

## Exit codes

| Code | Meaning |
| ---- | ------- |
| 0 | Success |
| 1 | Conversion or I/O error (including a failed fetch) |
| 2 | Invalid arguments |

See `../html-to-markdown/references/cli-reference.md` for the full flag set and
JSON shape.