I am not sure it’s even possible but – can I get the image file size from data URI?
For example, let’s say there is an IMG element where src
goes:
src="data:image/jpeg;base64,/9j/4AAQSkZJRgABAQAAAQABAAD...
Based on the src
, can I get the image file size by using plain JavaScript? (without server request)
Advertisement
Answer
If you want file size, simply decode your base64 string and check the length.
var src ="data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP/// yH5BAEAAAAALAAAAAABAAEAAAIBRAA7"; var base64str = src.substr(22); var decoded = atob(base64str); console.log("FileSize: " + decoded.length);