
Time-anchored elements
Click any model component to see its schedule node and resource allocation.
Read more →A browser-native 4D modeling platform for AEC teams to bind schedules to 3D models, simulate constructability, and export VR-ready outputs—without leaving the browser.

Integrate time directly into your 3D geometry—each element tagged with start/end dates, durations, and resource assignments. Visualize phasing, sequencing, and progress in real time using an intuitive timeline slider and color-coded schedule overlays.
See all of Visualize 4D Models →
Click any model component to see its schedule node and resource allocation.
Read more →
Overlay % complete against model views to spot slippage or idle work zones.
Read more →
Multiple reviewers work simultaneously in the same model—change phasing together, annotate clashes, or approve sequences with versioned comments pinned to specific time slices.
See all of Collaborate in Real Time →Send colleagues a link to a specific phase (e.g., ‘Day 73 – Concrete Pour Grid B3’) with all camera settings preserved.
Attach comments to elements at a point in time, not just the model version.
Revert to a prior phasing configuration in one click if a sequence proves unbuildable.
Package entire phasing sequences as lightweight, web-native scenes (glTF/WebXR) for offsite fabrication, field walkthroughs on tablets, or immersive VR coordination sessions—no plugins required.
See all of Export to Field & VR →
Import IFC, DWG, and Revit files directly—no conversion step. Pull schedule data from MS Project or Primavera via CSV/Project Online. Push Navisworks clash reports back into the model timeline for rapid re-simulation.
See all of Connect Your Tools →Runwhat-if simulations: add buffer, extend a duration, or shift phasing—and instantly see ripple effects on crew density, equipment conflicts, or critical path delays—without exporting to a desktop scheduler.
See all of See the Impact of Time →

Visualize concurrent trades per zone to avoid overbooking workspaces.
Read more →
Questions or ideas about 4d.io? Send a note and we will get back to you.
For acquisition, partnership or investment inquiries about 4d.io, use this form.