CSV to XML

// CSV string → XML with proper escaping
const csv = `name,age,city
Alice,30,Berlin
Bob,25,Tokyo`

function csvToXml(csv, rootTag = 'data', rowTag = 'row') {
  const rows = csv.trim().split('\n').map(r => r.split(','))
  const [headers, ...data] = rows
  const xmlRows = data.map(row => {
    const fields = headers.map((h, i) => {
      const val = (row[i] || '').replace(/&/g, '&')
        .replace(/</g, '&lt;').replace(/>/g, '&gt;')
      return `    <${h}>${val}</${h}>`
    }).join('\n')
    return `  <${rowTag}>\n${fields}\n  </${rowTag}>`
  }).join('\n')
  return `<?xml version="1.0" encoding="UTF-8"?>\n<${rootTag}>\n${xmlRows}\n</${rootTag}>`
}

console.log(csvToXml(csv))
// → <?xml version="1.0" encoding="UTF-8"?>
// → <data><row><name>Alice</name><age>30</age>...</row>...</data>

import csv, io
from xml.etree.ElementTree import Element, SubElement, tostring
from xml.dom.minidom import parseString

csv_string = """name,age,city
Alice,30,Berlin
Bob,25,Tokyo"""

reader = csv.DictReader(io.StringIO(csv_string))
root = Element('data')

for row in reader:
    row_el = SubElement(root, 'row')
    for key, value in row.items():
        child = SubElement(row_el, key)
        child.text = value

# Pretty-print with declaration
raw = tostring(root, encoding='unicode')
pretty = parseString(raw).toprettyxml(indent='  ')
print(pretty)
# → <?xml version="1.0" ?>
# → <data>
# →   <row>
# →     <name>Alice</name>
# →     <age>30</age>
# →     <city>Berlin</city>
# →   </row>
# →   ...
# → </data>

package main

import (
	"encoding/csv"
	"encoding/xml"
	"fmt"
	"os"
	"strings"
)

type Field struct {
	XMLName xml.Name
	Value   string `xml:",chardata"`
}

type Row struct {
	XMLName xml.Name `xml:"row"`
	Fields  []Field
}

type Data struct {
	XMLName xml.Name `xml:"data"`
	Rows    []Row
}

func main() {
	input := "name,age,city\nAlice,30,Berlin\nBob,25,Tokyo"
	r := csv.NewReader(strings.NewReader(input))
	records, _ := r.ReadAll()
	headers := records[0]

	var data Data
	for _, rec := range records[1:] {
		row := Row{}
		for i, h := range headers {
			row.Fields = append(row.Fields, Field{
				XMLName: xml.Name{Local: h},
				Value:   rec[i],
			})
		}
		data.Rows = append(data.Rows, row)
	}

	out, _ := xml.MarshalIndent(data, "", "  ")
	fmt.Println(xml.Header + string(out))
	// → <?xml version="1.0" encoding="UTF-8"?>
	// → <data><row><name>Alice</name>...</row>...</data>
}

# Using Python's csv and xml modules via one-liner
python3 -c "
import csv, sys
from xml.etree.ElementTree import Element, SubElement, tostring
from xml.dom.minidom import parseString

reader = csv.DictReader(sys.stdin)
root = Element('data')
for row in reader:
    r = SubElement(root, 'row')
    for k, v in row.items():
        SubElement(r, k).text = v
print(parseString(tostring(root, encoding='unicode')).toprettyxml(indent='  '))
" < data.csv

# Using Miller (mlr) — a dedicated CSV/JSON/XML tool
mlr --icsv --oxml cat data.csv