On PC you can have a variety. Use Musicbrainz Picard, Musicbee, easytagger etc.
Since my laptop is broken and I can't afford to fix it now, I use, music sense on my phone, link:http://www.windowsphone.com/s?appid=9cb102e1-8926-484d-877e-832316d9ee7f
Thanks for your reply but do these allow to edit artist pictures or just album art.