Export from Foundry
Right-click your Scene in Foundry VTT and choose Export Data to save the JSON file.
Free browser tool
Foundry-to-Roll20
Wall Converter
Turn exported Foundry VTT scenes into Roll20-ready UVTT files — walls, doors, lights, grid size and scene dimensions included.
Processed locally in your browser — no files are uploaded.No install. No upload.
Convert Your Scene
1
Foundry Scene export
Add JSON files
Drop JSON files here or click to browse
Foundry VTT Scene exports only
2
Choose your map type
How will you use the UVTT?
Add matching map images
WEBP, PNG, JPG or JPEG · names are matched automatically
Advanced settings & detected scene data
Files are processed locally and never leave your device.
From export to game table
Three Steps. That's It.
Convert Here
Add up to ten JSON exports, choose animated or static, and download the generated UVTT files.
Import into Roll20
Create a page, upload the UVTT background, then verify doors and Dynamic Lighting in player view.
Before you export
Keep Every Wall Inside the Map
No wall, door or movement barrier in the source Foundry Scene may extend beyond the actual map rectangle. For reliable conversion, leave at least one full grid square of clear margin around the map edge.
What comes across
More Than Just Walls
Walls & Barriers
Sight-blocking walls and movement-only barriers remain separate.
Doors & Portals
Doors are imported closed for safe manual review in Roll20.
Light Sources
Position, range, color, intensity and shadow behavior are preserved.
Grid & Dimensions
Scene size, grid squares, padding and pixels per grid are calculated.
For animated battlemaps
UVTT First.
WEBM Second.
UVTT cannot store animation. Import the generated technical layer first, then place your matching WEBM on Roll20's Map & Background layer and set it to the exact square dimensions shown by the converter.
- 1 Upload the UVTT and let Roll20 create the page.
- 2 Drag the WEBM onto Map & Background.
- 3 Use Advanced → Set Dimensions → Pixels to Units.
WEBM map layer
UVTT technical layer
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