If they are on your PC, they can be resized in Paint.

To get the size you want to post here from Flickr, go to the image you want. In the lower right there's an option to download the picture, if you click on the arrow, you'll have an option to view all sizes, click on that. On the next page it will show all the options you have to download. One of the options is Large 1024, click on that if it doesn't take you directly to that size. You can right click on your image and choose copy image address and paste that into DU.

They have an option to resize your original to a variety of sizes. Free accounts, too.

https://postimages.org/login

To resize yourself, you almost certainly have an image editing tool on your system that will resize & crop images. Right click on an image file & see what applications you can choose from to open the file with.

n/t

Created an account and resized a photo I posted last night which was too large to view without scrolling. Works well and it's free.

I take a screenshot of the photo. (save it and upload it)

Screenshots are consistently the same rough size each time.

No EXIF information leaking to the world divulging the model and serial number of the lens, either.

In a way, that's theft protection for your lens (like etching the serial number) but OTOH, it's creepy to me.

I will poke around at those suggestions.

By changing the size. The size selection also seems to stick at the last requested setting. Which is good for loading more than one.