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Bash - convert png image to base64 data url

9 points
Created by:
Nataniel-Barclay
289

In this short article, we would like to show how to convert *.png file to Data URL encoded with base64 using Bash.

Quick solution:

echo -n "data:image/png;base64,$(cat input_image.png | base64 | tr -d '\r\n')" > output_image.txt

Where: input_image.png is converted to output_image.txt (Data URL with base64 inside).

 

Example result

Now Data URL is written to output_image.txt can be used as an embedded resource on the web page, eg.

<html>
<body>
  <img src="data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAgAAAAIACAYAAAD0eNT ...">
</body>
</html>

Screenshot:

PNG conversion to base64 Data URL under Bash
PNG conversion to base64 Data URL under Bash

See also

  1. Bash - convert jpg image to base64 data url

  2. Bash - remove new line characters from file with tr command 

Bash

Bash - convert png to base64 data url
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