01
Syntax Highlighting
JavaScript highlighting so long scripts stay smooth.
02 — Editor
The editor is the workbench
Write, run and revise in one place. Syntax highlighting, completion and the run button are always within reach.
02
Completion
API and component properties appear as you type, so you rarely need the docs.
03
One-Tap Run
Press ▶︎ to render immediately. Edit, run again, and the interface updates.
04
Keyboard Accessory
Symbol and indent keys built for JavaScript, so you can write on a phone.
03 — Runtime
Scripts reach the system
57 native views and controls, plus 17 system interfaces. Scripts call them directly — no bridge to write.
Interface
Stacks, grids, lists, forms, navigation and controls — all rendered natively.
System
Clipboard, notifications, share, speech, QR codes, haptics, calendar, reminders, location and photo picker.
Data
Local storage, file read and write, local databases.
Network
HTTP requests come from your script and connect directly to the address it names.
04 — Gallery
21
21 design languages, ready to read
28 bundled scripts across Editorial, Graphic, Technical, Organic and Product styles, plus starter examples and widgets. Every one runs and edits as-is.
EditorialGraphicTechnicalOrganicProductWidgets
05 — Widgets
Widgets are scripts too
One script can draw both Home Screen and Lock Screen widgets. Three Home Screen sizes, plus three Lock Screen styles.
Small
01
Medium
02
Large
03
Circular
04
Rectangular
05
Inline
06
06 — FAQ
Frequently Asked Questions
Which devices does JSBox support?
JSBox runs on iPhone with iOS 15.0 or later.
Do I need an account?
No. JSBox has no account, no ads and no tracking, and it contains no analytics or crash-reporting SDK.
Are my scripts uploaded?
No. Scripts, runtime data and local storage stay on your device and are never uploaded to our servers.
Can a script access the network?
Yes, but only when the script calls the HTTP interface. The request goes from your device straight to the address the script names; we do not proxy or log it.
Is it safe to run someone else's script?
A script can read and write files, reach the network and call system interfaces. Run only code you trust, and read a script before you run it.
How do I delete my data?
Delete scripts in the app, or uninstall the app. All data is on-device, so uninstalling removes it.