pdf2png.py

import fitz  # pip install pymupdf

pdffile = "file.pdf"
doc = fitz.open(pdffile)
for i in range(doc.pageCount):
    page = doc.loadPage(i)
    zoom = 5
    pix = page.getPixmap(matrix=fitz.Matrix(zoom, zoom))
    output = "file_%d.png" % i
    pix.writePNG(output)