ASTC File Format
Understand what an ASTC file stores, why the format is common on mobile GPUs, and how to export ASTC to PNG for inspection.
ASTC format essentials
- ASTC uses fixed 128-bit blocks and varies the block size to balance quality and compression ratio.
- Typical .astc files record block dimensions, texture width and height, and optional depth in the header.
- A common workflow is opening an ASTC file and exporting PNG output to visually verify the texture.
Related tools
Use the site ASTC viewer and encoder to validate the format, export PNG, or re-encode the texture.