I have advised here few times an easy web for pictures 666kB.com for pictures less than 666 kB.



"Choose file" from your computer, then click on:
"Speichern" (Save)

Another box appears:


Under the BBCode the link to mark up by CTRL-A (will turn on blue) and copy by CTRL-C (no need to care about the other links)

Then paste it in the post by CTRL-V

So easy...