how do i modify a passport picture to 600*600 pixels?

I want to make my pictues to 600*600 pixels but I am not able to find the option that can help me to get it on the software? Can anyone please help me out? Thanks.

The answer normally depends on the original size and the software that you want to use.

Can you tell us whether you are tring to print out the photo to send to the passport office? If so then the requirements in the US and any other countries may be different and it may have the image at 2 x 2 inches. There are specific requirements for the quality of the printed image. Incase you are trying to resize an image that is at a less resolution than 600 X 600 then the quality of the image will not be good.

Use Pic resizs to get 600 pixel by 600 pixel

1. Select Picture: Browse
Browse
Then click on continue

2. Resize Your Picture:
Make My Picture: click and select custom size
In width put your size then select pixels In Height put your size pixels
Then Click on I 'm Done, Resize My Picture!

Finally, you will get it
Your Image Width Height Filesize
Original 3264 x 2176 1947 KB
New 600 x 600 127 KB