Cambridge Assessment English or Cambridge English develops and produces Cambridge English Qualifications and the International English Language Testing System (IELTS). The organisation contributed to the development of the Common European Framework of Reference for Languages (CEFR), the standard used around the world to benchmark language skills, and its qualifications and tests are aligned with CEFR levels.

Cambridge Assessment English is part of Cambridge Assessment, a non-teaching department of the University of Cambridge which merged with Cambridge University Press to form Cambridge University Press & Assessment in August 2021.

Each Cambridge English Qualifications focuses on a level of the Common European Framework of Reference (CEFR).

These English qualifications are to help school-age children and young people improve their English language skills.

These qualifications are designed for adult learners. A2 Key, B1 Preliminary and B2 First have the same exam format (e.g. number of papers, number of questions, time allowance) as the schools' versions of these qualifications, but use different topics and content suited to adult learners.^{[citation needed]}

These qualifications are designed for adult learners learning English for use in a business context.

Multilevel tests are used to find out which English learning programme or exam is right for a student. These cover multiple levels of the CEFR in one test.

Cambridge Exams Publishing, a joint venture with Cambridge University Press, produces Cambridge-branded IELTS resources and materials to help learners prepare and practise for their tests.