Every GitHub repository comes with its own wiki. This is a great place to put the documentation for your project. What isn’t clear from the wiki documentation is how to add images to your wiki. Here’s my step-by-step guide. I’m going to add a logo to the main page of my WikiDemo repository’s wiki:

https://github.com/mikehadlow/WikiDemo/wiki/Main-Page

First clone the wiki. You grab the clone URL from the button at the top of the wiki page.

$ git clone git@github.com:mikehadlow/WikiDemo.wiki.git
Cloning into 'WikiDemo.wiki'...
Enter passphrase for key '/home/mike.hadlow/.ssh/id_rsa':
remote: Counting objects: 6, done.
remote: Compressing objects: 100% (3/3), done.
remote: Total 6 (delta 0), reused 0 (delta 0)
Receiving objects: 100% (6/6), done.

Create a new directory called ‘images’ (it doesn’t matter what you call it, this is just a convention I use):

$ mkdir images

Then copy your picture(s) into the images directory (I’ve copied my logo_design.png file to my images directory).

$ ls -l
-rwxr-xr-x 1 mike.hadlow Domain Users 12971 Sep  5  2013 logo_design.png

Commit your changes and push back to GitHub:

$ git add -A


$ git status
# On branch master
# Changes to be committed:
#   (use "git reset HEAD <file>..." to unstage)
#
#       new file:   images/logo_design.png
#


$ git commit -m "Added logo_design.png"
[master 23a1b4a] Added logo_design.png
 1 files changed, 0 insertions(+), 0 deletions(-)
 create mode 100755 images/logo_design.png


$ git push
Enter passphrase for key '/home/mike.hadlow/.ssh/id_rsa':
Counting objects: 5, done.
Delta compression using up to 4 threads.
Compressing objects: 100% (3/3), done.
Writing objects: 100% (4/4), 9.05 KiB, done.
Total 4 (delta 0), reused 0 (delta 0)
To git@github.com:mikehadlow/WikiDemo.wiki.git
   333a516..23a1b4a  master -> master

Now we can put a link to our image in ‘Main Page’:

Save and there’s your image for all to see: