Welcome to PowDLL download page

Current Version: 3.20

Your essential tool for converting Powder X-ray Diffraction (XRD) files across formats.

If you find PowDLL useful, cite it:
PowDLL, a reusable .NET component for interconverting powder diffraction data: Recent developments, N. Kourkoumelis, ICDD Annual Spring Meetings (ed. Lisa O'Neill), Powder Diffraction, 28 (2013) 137-48.

Version History

A log of changes, improvements, and bug fixes.

• Version 3.20 (Feb 2026)
  Update of the installation script due to false positive antivirus alerts.
  
  
• Version 3.20 (Jan 2026)
  Big data support for .XY and .XYE files. The import / export pipeline is significantly faster, more efficient, and optimized for disk and memory use.
  
  
• Version 3.19 (Jan 2026)
  - PowDLL export to Excel now supports big data, breaking past the 256-column .xls limit. PowDLL can generate as many Excel files as needed, with no practical limit. The entire export pipeline is faster (>10×), more efficient, and optimized for disk and memory use.
  
  
• Version 3.18 (June 2025)
  - Optimized for Windows 11 with an updated .NET Framework. Version 3.17 targets legacy windows systems
  
  
• Version 3.17 (March 2025)
  - Improved the handling of files containing multiple datasets. When exporting to Excel (.xls), the default format is now X, Y1, Y2, Y3, etc., provided the X-column values are identical.
  
  
• Version 3.16 (March 2025)
  - Added support for JSON files as described in the Open Experimental Powder X-Ray Diffraction Database (opXRD) (see https://arxiv.org/abs/2503.05577)
  
  
• Version 3.15 (November 2024)
  - Updated the setup file
  - Moved the download to a secure https server