F³FormFieberBETA
ENDE
Ready to play
YOUR NEXT GAME NIGHT. IN 3D.

Big ideas.
Simple shapes.

One builds. Everyone guesses.
How much rocket can you fit into three cylinders?

Play with friends
♧ 2–12 friends◇ Free & right in your browser
FOUR SHAPES. ENDLESS POSSIBILITIES.
✦ Imagination on.
Rocket? 🚀 +420
CubeSphereCylinderCone
01 Invite your friends02 Build a word in 3D03 Guess fast & score points

What is FormFieber?

A free multiplayer 3D guessing game in your browser: one player builds a secret word while everyone else watches the model take shape and guesses in chat. Instead of drawing, you combine shapes in space. No game download needed.

How it works

  1. 1. Get a wordThe builder chooses from three options.
  2. 2. Build it in 3DShow the defining features before time runs out.
  3. 3. Friends guessEveryone else submits answers and earns points.

Build with simple shapes

Cubes, spheres, cylinders and cones are enough to start. Move, rotate, scale and color them, then correct mistakes with Undo. Multi-selection and the Cut tool help with the details.

Explore the Building Guide →

Play your way

Private Rooms

Share a code with friends. The host chooses rounds, time and difficulty.

Quick Play

Find a public waiting room. Matches start when enough real players arrive.

Practice

Build alone without a timer. Save on your device or download a model file.

Learn more

More ways to discover FormFieber
PRIVATE ROOM
Lobby
READY FOR A NEW DIMENSION?Your workbench is waiting.
◷—
YOUR 3D WORKBENCH
↔ Drag: orbit camera · Scroll: zoom0 / 100 shapes

Save model

Download a model file. In Practice, this also updates your save on this device.

SMALL SHAPES. BIG FUN.

How to play FormFieber.

Create a room and invite at least one friend. Everyone builds once per round. The builder chooses a word; everyone else guesses in chat.

  1. Add a cube, sphere, cylinder or cone.
  2. Select a shape and drag the colored axes. W moves, E rotates, R scales.
  3. Drag empty space to orbit. Scroll to zoom. Right-drag to pan.
  4. Ctrl+D duplicates, Del deletes, Ctrl+Z/Y undoes / redoes.

Correct guesses earn 100–500 points. The builder earns 100 points per correct guess. Words and answers follow your selected interface language. The host language is the fallback for clients without a language preference.

Hold left mouse button + WASD / Arrow Keys to move

Choose Cut without selecting anything. Position the blue cutter with Move, Rotate and Scale. The part of the cutter inside an object turns red; a bright rim marks the boundary. Apply cuts all overlapping objects, including unselected ones. Cancel or Esc discards the preview; Undo restores the whole cut.

Best played on a computer with a mouse or trackpad.

Keep your creation?

Save this model on this device for your next practice session, or discard the current changes.

Clear the workbench?

Remove all shapes from this practice session. Your previous save stays unchanged until you save again.