File Converter

Overview

Convert files between formats across three categories: documents, data files, and images. Generate Python code dynamically for each conversion request, selecting appropriate libraries and handling edge cases.

Conversion Categories

Documents

From To Recommended Library

Markdown HTML markdown or mistune

HTML Markdown markdownify or html2text

HTML PDF weasyprint or pdfkit (requires wkhtmltopdf)

PDF Text pypdf or pdfplumber

DOCX Markdown mammoth

DOCX PDF docx2pdf (Windows/macOS) or LibreOffice CLI

Markdown PDF Convert via HTML first, then to PDF

Data Files

From To Recommended Library

JSON YAML pyyaml

YAML JSON pyyaml

JSON CSV pandas or stdlib csv

• json

CSV JSON pandas or stdlib csv

• json

JSON TOML tomli /tomllib (read) + tomli-w (write)

XML JSON xmltodict

JSON XML dicttoxml or xmltodict.unparse

Images

From To Recommended Library

PNG/JPG/WebP/GIF Any raster Pillow (PIL)

SVG PNG/JPG cairosvg or svglib

• reportlab

PNG SVG potrace (CLI) for tracing, limited fidelity

Workflow

• Identify source format (from file extension or user statement)

• Identify target format

• Check references/ for format-specific guidance

• Generate conversion code using recommended library

• Handle edge cases (encoding, transparency, nested structures)

• Execute conversion and report results

Quick Patterns

Data: JSON to YAML

import json import yaml

with open("input.json") as f: data = json.load(f)

with open("output.yaml", "w") as f: yaml.dump(data, f, default_flow_style=False, allow_unicode=True)

Data: CSV to JSON

import csv import json

with open("input.csv") as f: reader = csv.DictReader(f) data = list(reader)

with open("output.json", "w") as f: json.dump(data, f, indent=2)

Document: Markdown to HTML

import markdown

with open("input.md") as f: md_content = f.read()

html = markdown.markdown(md_content, extensions=["tables", "fenced_code"])

with open("output.html", "w") as f: f.write(html)

Image: PNG to WebP

from PIL import Image

img = Image.open("input.png") img.save("output.webp", "WEBP", quality=85)

Image: SVG to PNG

import cairosvg

cairosvg.svg2png(url="input.svg", write_to="output.png", scale=2)

Resources

Detailed guidance for complex conversions is in references/ :

• references/document-conversions.md

• PDF handling, encoding issues, styling preservation

• references/data-conversions.md

• Schema handling, type coercion, nested structures

• references/image-conversions.md

• Quality settings, transparency, color profiles

Consult these references when handling edge cases or when the user has specific quality/fidelity requirements.