The Barton English Test: Check your English Level Online for Free
This test will determine your English level. You will be tested on all areas of English (verb tense, prepositions, articles, phrasal verbs, idioms, collocation, etc). There are 10 questions per page. You can continue to the next level if you get a 70% score. If you fail a level, you will have a second chance to pass it.
The test is based on the British Council / EAQUALS Core Inventory for General English and therefore should be a reliable guide to your English level. Good luck!