Scripts can make changes to the active Illustrator document. Before running a script, check the description so you understand what it is designed to do.
For important production files, we recommend saving your work before running any script. In many cases, changes made by a script can be reverted using Illustrator’s Undo command, but this may depend on the script, the document, and the operation performed.
Scripts are provided to support and improve Illustrator workflows, but results may vary depending on your Illustrator version, operating system, document structure, installed plugins, and artwork complexity.