[Tip] Running JavaScript in Shortcuts (iOS, macOS)

Changelog 2025-10-27 Restructured content with more details Added section on Run JavaScript on Web Page 2023-09-27 Moved to Automators Talk Corrected speed comparison of rendering methods Added info on iOS 17 bug 2022-09-30 Initially posted on Reddit (https://​www.reddit.com/​r/​shortcuts/​comments/​xs5xtm/) Intro For data processing that involves a large number of operations and/or loops, JavaScript can be much faster than built-in shortcut actions. Running JS using the data URI sch...