HTML5 - resize image and keep EXIF in resized image

Question

How can I resize an image (using an HTML5 canvas element) and keep the EXIF information from the original image? I can extract EXIF info from from original imag

Answer 1

Canvas generates images with 20 bytes header (before jpeg data segments start). You can slice head with exif segments from original file and replace first 20 bytes in resized one.