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Editorial Team
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Asked: 2026-06-14T06:27:57+00:00

I need to save my canvas data with id=’area’ as an image to my

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I need to save my canvas data with id=’area’ as an image to my server in folder /uploads with javascript.

I tried to display image in browser with window.open(canvas.toDataURL(“image/png”)); but browser displays blank screen

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1 Answer

  1. Editorial Team

    you can use the toDataURL()

    Note : The toDataURL() method requires that any images drawn onto the canvas are hosted on a web server with the same domain as the code executing it. If this condition is not met, a SECURITY_ERR exception is thrown.

    for example

     <body>
    <canvas id="myCanvas" width="578" height="200" style="display:none;"></canvas>
    <img id="canvasImg" style="border:1px solid #9C9898;" alt="Right click to save me!">
    <script>
      var canvas = document.getElementById('myCanvas');
      var context = canvas.getContext('2d');

      // draw cloud
      context.beginPath();
      context.moveTo(170, 80);
      context.bezierCurveTo(130, 100, 130, 150, 230, 150);
      context.bezierCurveTo(250, 180, 320, 180, 340, 150);
      context.bezierCurveTo(420, 150, 420, 120, 390, 100);
      context.bezierCurveTo(430, 40, 370, 30, 340, 50);
      context.bezierCurveTo(320, 5, 250, 20, 250, 50);
      context.bezierCurveTo(200, 5, 150, 20, 170, 80);
      context.closePath();
      context.lineWidth = 5;
      context.fillStyle = '#8ED6FF';
      context.fill();
      context.strokeStyle = '#0000ff';
      context.stroke();

      // save canvas image as data url (png format by default)
      var dataURL = canvas.toDataURL();

      // set canvasImg image src to dataURL
      // so it can be saved as an image
      document.getElementById('canvasImg').src = dataURL;

    </script>
  </body>
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