New Living Translation
Suddenly, there was a massive earthquake, and the prison was shaken to its foundations. All the doors immediately flew open, and the chains of every prisoner fell off!

American Standard Version
and suddenly there was a great earthquake, so that the foundations of the prison-house were shaken: and immediately all the doors were opened, and every one's bands were loosed.

Berean Study Bible
Suddenly a strong earthquake shook the foundations of the prison. At once all the doors flew open and everyone’s chains came loose.

Douay-Rheims Bible
And suddenly there was a great earthquake, so that the foundations of the prison were shaken. And immediately all the doors were opened, and the bands of all were loosed.

English Revised Version
and suddenly there was a great earthquake, so that the foundations of the prison-house were shaken: and immediately all the doors were opened; and every one's bands were loosed.

King James Bible
And suddenly there was a great earthquake, so that the foundations of the prison were shaken: and immediately all the doors were opened, and every one's bands were loosed.

World English Bible
Suddenly there was a great earthquake, so that the foundations of the prison were shaken; and immediately all the doors were opened, and everyone's bonds were loosened.

Young's Literal Translation
and suddenly a great earthquake came, so that the foundations of the prison were shaken, opened also presently were all the doors, and of all -- the bands were loosed;

Acts 16:26 Additional Translations ...