Align lines of text to center in SVG

Solution 1:

If you add text-anchor="middle" to each tspan you will center them (you have to remove the space between the tspans as well, otherwise the extra space will be considered as part of the first line and they won't be completely centered).

For example:

<svg>
    <text y="50" transform="translate(100)">
       <tspan x="0" text-anchor="middle">000012340000</tspan><tspan x="0" text-anchor="middle" dy="15">1234</tspan>
   </text>
</svg>

See: JSFiddle

Solution 2:

DEMO

text-anchor='start' for right align.

text-anchor='middle' for middle align.

text-anchor='end' for left align.

Code from demo:

<svg width="100%" height="230" viewBox="0 0 120 230"
     xmlns="http://www.w3.org/2000/svg" version="1.1">

    <!-- Materialisation of anchors -->
    <path d="M60,15 L60,110 M30,40 L90,40 M30,75 L90,75 M30,110 L90,110" stroke="grey" />


    <!-- Anchors in action -->
    <text text-anchor="start"
          x="60" y="40">This text will align right</text>

    <text text-anchor="middle"
          x="60" y="75">This text will align middle</text>

    <text text-anchor="end"
          x="60" y="110">This text will align left</text>

    <!-- Materialisation of anchors -->
    <circle cx="60" cy="40" r="3" fill="red" />
    <circle cx="60" cy="75" r="3" fill="red" />
    <circle cx="60" cy="110" r="3" fill="red" />

<style><![CDATA[
text{
    font: bold 15px Verdana, Helvetica, Arial, sans-serif;
}
]]></style>
</svg>

Read more about text-anchor property here

Solution 3:

Key points to horizontally centering the text:
1. x="50%"
2. text-anchor='middle'

In your case, you may write as:

<svg style="width:100%">
  <text y="50">
    <tspan x="50%" text-anchor="middle"> First line </tspan>
    <tspan x="50%" dy="15" text-anchor="middle"> Second line </tspan>
  </text>
</svg>