Why convert USD to USDA?
People convert usd to .usda to read and hand-edit the scene in a text editor, diff it in version control, or debug composition, since .usda is the ASCII form while .usdc is binary crate. The two are interchangeable representations of the same USD data.
How to convert USD to USDA
usdcat (OpenUSD) FREE
Run usdcat -o scene.usda scene.usd to write the ASCII form. To force the format inside a .usd file, add --usdFormat usda.
OpenUSD usdview / Python OPEN-SOURCE
In Python, open the stage with Usd.Stage.Open('scene.usd') and call stage.Export('scene.usda') to serialize it as ASCII.
About these formats
A .usd file holds a 3D scene in Pixar's Universal Scene Description format, storing geometry, shading, and references to other assets that get composed into one scenegraph. The plain .usd…
Open .USD details →A .USDA file is a data file used by specific software.
Open .USDA details →Quality & what to watch
- The conversion is lossless in scene content; only the on-disk encoding changes from binary crate to ASCII text.
- USDA files are much larger and slower to load than binary USDC, so they are best for editing and debugging, not production runtime.
- If the input
.usdwas already ASCII, the operation just rewrites (and normalizes) the same text.
Frequently asked questions
What is the difference between .usd, .usda and .usdc?
.usda is ASCII text, .usdc is binary crate, and .usd is a generic container that can hold either encoding internally.Does converting to USDA lose any data?
Can I edit a .usda file by hand?
.usdc if needed.How do I convert back to binary?
usdcat -o scene.usdc scene.usda, which writes the compact binary crate form of the same content.