XSLT to transform SVG converted from PDF so it scales in an HTML5 img tag, per <https://css-tricks.com/scale-svg/>.

I_said_Svg.xslt

<?xml version="1.0" encoding="UTF-8"?>
<xsl:stylesheet xmlns:xsl="http://www.w3.org/1999/XSL/Transform"
    xmlns:xs="http://www.w3.org/2001/XMLSchema"
    xmlns='http://www.w3.org/2000/svg'
    xmlns:svg='http://www.w3.org/2000/svg'
    exclude-result-prefixes="xs"
    version="1.1">
  <xsl:template match="svg:svg[@viewBox]">
    <xsl:copy>
      <xsl:copy-of select="@*[name(.)!='height' and name(.) != 'width']" />
      <xsl:attribute name="height">100%</xsl:attribute>
      <xsl:attribute name="preserveAspectRatio">xMidYMid meet</xsl:attribute>
      <xsl:apply-templates select="node()" />
    </xsl:copy>
  </xsl:template>
  <!-- IdentityTransform -->
  <xsl:template match="/ | @* | node()">
    <xsl:copy>
      <xsl:apply-templates select="@* | node()" />
    </xsl:copy>
  </xsl:template>
</xsl:stylesheet>