npm install save-svg-as-png

To save a PNG, include the script saveSvgAsPng.js in your page, then call the saveSvgAsPng function with an SVG node and a filename:

saveSvgAsPng(document.getElementById("diagram"), "diagram.png");

The filename is the preferred filename when saving the image to the file system. The browser may change the name of the file if there is already a file by that name in the target directory.

If you want to scale the image up or down, you can pass a scale factor in an options object:

saveSvgAsPng(document.getElementById("diagram"), "diagram.png", {scale: 0.5});

Other options are documented below.

If you just want a dataURI for an SVG, you can call svgAsDataUri with an SVG node, options, and a callback:

svgAsDataUri(document.getElementById("diagram"), {}, function(uri) {
  ...
});

If you want a dataURI of a PNG generated from an SVG, you can call svgAsPngUri with an SVG node, options, and a callback:

svgAsPngUri(document.getElementById("diagram"), {}, function(uri) {
  ...
});

Compatible with browserify and requirejs.

If you want to use TypeScript, necessary type definitions are available in Typings public registry.

• backgroundColor — Creates a PNG with the given background color. Defaults to transparent.
• left - Specify the viewbox's left position. Defaults to 0.
• height - Specify the image's height. Defaults to the viewbox's height if given, or the element's non-percentage height, or the element's bounding box's height, or the element's CSS height, or the computed style's height, or 0.
• scale — Changes the resolution of the output PNG. Defaults to 1, the same dimensions as the source SVG.
• selectorRemap — A function that takes a CSS selector and produces its replacement in the CSS that's inlined into the SVG. Useful if your SVG style selectors are scoped by ancestor elements in your HTML document.
• top - Specify the viewbox's top position. Defaults to 0.
• width - Specify the image's width. Defaults to the viewbox's width if given, or the element's non-percentage width, or the element's bounding box's width, or the element's CSS width, or the computed style's width, or 0.
• encoderType - A DOMString indicating the image format. The default type is image/png.
• encoderOptions - A Number between 0 and 1 indicating image quality. The default is 0.8

Internet Explorer is not supported due to the SecurityError it throws when calling toDataURL on a canvas that's been written to.