def to_img_tag(b64):
    """Create an Img html tag from a base64 string.

    Parameters
    ----------
    b64 : :class:`str`
        A base 64 string.

    Returns
    -------
    :class:`str`
        The <img> tag.
    """
    return f'<img src="data:image/jpeg;base64, {b64}"/>'