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HTML Canvas Text Alignment


HTML Canvas Text Alignment

To align text in the canvas, we use two properties:

  • textBaseline - defines the baseline (the vertical alignment) of text
  • textAlign - defines the horizontal alignment of text

The textBaseline Property

The textBaseline property defines the baseline (the vertical alignment) of text.

The textBaseline property can have the following values:

  • "top"
  • "hanging"
  • "middle"
  • "alphabetic" - this is default
  • "ideographic"
  • "bottom"

Example

Demonstration of the different values for the textBaseline property:

Your browser does not support the HTML5 canvas tag.
<script>
const canvas = document.getElementById("myCanvas");
const ctx = canvas.getContext("2d");

// Create a line
ctx.strokeStyle = "black";
ctx.lineWidth = 2;
ctx.beginPath();
ctx.moveTo(0,75);
ctx.lineTo(500,75);
ctx.stroke();
ctx.closePath();

ctx.font = "20px Arial";
ctx.fillStyle = "purple";

ctx.textBaseline = "top";
ctx.fillText("top", 5, 75);

ctx.textBaseline = "hanging";
ctx.fillText("hanging", 40, 75);

ctx.textBaseline = "middle";
ctx.fillText("middle", 120, 75);

ctx.textBaseline = "alphabetic";
ctx.fillText("alphabetic", 190, 75);

ctx.textBaseline = "ideographic";
ctx.fillText("ideographic", 295, 75);

ctx.textBaseline = "bottom";
ctx.fillText("bottom", 410, 75);
</script>
Try it Yourself »


The textAlign Property

The textAlign property defines the horizontal alignment of text.

The textAlign property can have the following values:

  • "left"
  • "right"
  • "center"
  • "start" - this is default
  • "end"

Example

Demonstration of the different values for the textAlign property:

Your browser does not support the HTML5 canvas tag.
<script>
const canvas = document.getElementById("myCanvas");
const ctx = canvas.getContext("2d");

// Create a line
ctx.strokeStyle = "black";
ctx.lineWidth = 2;
ctx.beginPath();
ctx.moveTo(250,0);
ctx.lineTo(250,250);
ctx.stroke();
ctx.closePath();

ctx.font = "20px Arial";
ctx.fillStyle = "purple";

ctx.textAlign = "center";
ctx.fillText("center", 250, 20);

ctx.textAlign = "start";
ctx.fillText("start", 250, 50);

ctx.textAlign = "end";
ctx.fillText("end", 250, 80);

ctx.textAlign = "left";
ctx.fillText("left", 250, 110);

ctx.textAlign = "right";
ctx.fillText("right", 250, 135);
</script>
Try it Yourself »

Center Text

Example

Center text both vertically and horizontally in the canvas:

Your browser does not support the HTML5 canvas tag.
<script>
const canvas = document.getElementById("myCanvas");
const ctx = canvas.getContext("2d");

ctx.font = "30px Verdana";
ctx.fillStyle = "red";
ctx.textAlign = "center";
ctx.textBaseline = "middle";
ctx.fillText("Hello World", canvas.width/2, canvas.height/2);
</script>
Try it Yourself »

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