Archive-on-Save is an AutoCAD LISP utility that automatically generates a timestamped backup copy every time a drawing is saved. This lightweight AutoLISP script functions as a background utility designed to enhance file security within AutoCAD and Civil 3D environments. By automating the creation of timestamped archive files during the standard save process, it ensures that previous iterations of a drawing remain accessible without manual intervention. The script is designed to operate silently, managing version history by producing distinct, dated copies of the active DWG file. Its architecture is focused on simplicity and performance, ensuring that the background archiving process does not interrupt the primary drafting workflow or cause significant latency during save operations.

The download is a 10 KB file containing .LSP files.

To implement this tool, load the LSP file into your AutoCAD or Civil 3D session using the APPLOAD command. Once loaded, the script runs automatically in the background, requiring no further user input to monitor save events. It is recommended to test the script in a non-critical environment first to verify that the file output location aligns with your project folder structure and internal file management protocols for CAD data backups.

This utility is essential for architects, civil engineers, and drafters working on complex projects where maintaining a clear revision history is critical for quality control. It is particularly useful in fast-paced design environments where frequent saving is standard practice, providing a safety net against accidental overwrites or file corruption. Professionals managing large-scale infrastructure or complex building models can use this to maintain a granular audit trail, ensuring that progress is captured incrementally throughout the development of construction documentation and technical drawings.