Which online character count tool is helpful for content marketing?

Does any body know any tools that help me to count the characters on website/pages.
online tools will be better.

Jonas Rashedi - Digital Consultant und Seminar Veranstaldter, spezialisiert in Daten und Web-Analyse mit mehr als 10 Jahre Erfahrung.
http://www.jonas-rashedi.de/

Mintent is a content marketing platform that gives marketers the ability to automate workflows, manage deadlines, and provide their team with one centralized location for shared files. Using a team calendar also provides visibility and allows marketers to stop using spreadsheets and emails to manage content.
http://www.getmintent.com/