Fragment Builder is made and published by Adnan Vehabović, an independent developer based in Sarajevo, Bosnia and Herzegovina. It's free to play in any browser, installs as an app, and works offline — with no sign-up and nothing that interrupts a puzzle.
Every puzzle begins as a shape broken into pieces. You drag each fragment back toward where it belongs, and when it's close enough it eases into place with a small spring. That single interaction runs through nine puzzle families and three dimensions — flat 2D boards, a foldable 2.5D cube, and a free-space 3D box.