Open a 3D file like it's a photo.
No render, no plugin, no separate app. Cotoon renders GLB, GLTF, OBJ, FBX, and STL directly in the browser — orbit the mesh, play the animation, and leave a comment pinned to the exact part that needs work.
The short version
Every format your pipeline actually uses
GLB, GLTF, OBJ, FBX, and STL open the same way — drag in, click, and you're looking at the model. No format-specific plugin to install first.
Animation plays, not just a static mesh
Rigged and animated files play back in the viewer, not just the base geometry — so a rig or walk cycle can be reviewed without exporting a video first.
Comments pin to the model, not a screenshot
Leave a note on a specific vertex, edge, or region of a mesh. The comment stays attached to that spot as you orbit, not floating disconnected in a text box.
No render just to get feedback
The usual workaround for reviewing a 3D asset is rendering a turntable or a few preview angles, uploading those, and hoping they show what the reviewer needs to see. If they ask for a different angle, you re-render. Cotoon's viewer skips that entirely — orbit, zoom, and inspect the actual geometry live, in the browser.
That matters most for rigging and modeling review, where the whole point is checking silhouette, topology, or deformation from angles nobody thought to pre-render.
Built for the review conversation, not just display
A 3D viewer that only displays the model is a dead end for feedback — someone still has to describe which part they mean in a separate comment thread. Cotoon's comments pin directly to a position on the mesh, so "this shoulder joint looks off" points at the actual shoulder joint, not a paragraph of description.
Every version, the same viewer
Because the viewer is tied into the same version history as the rest of a file, checking whether a fix landed means opening the new version — not re-exporting, re-uploading to a separate tool, or re-explaining context that already existed on the last round.
Stop rendering just to get a look.
Drop in a GLB, FBX, or OBJ and see it live — free, no credit card.
Try the 3D viewer for free