Theme and editor settings

The icon in the header cycles between light, dark and system. System follows your operating system setting and changes with it.

No flash on load

The theme is applied before the page paints, so switching between pages in dark mode never shows a white flash.

Editor preferences

The privacy centre holds the editor settings: font size, line wrapping, and whether recently used tools are remembered. They apply to every tool immediately.

Line wrapping

Off by default, so long lines scroll horizontally and columns stay aligned. Turn it on for prose or for reading a minified document. Turning it off also helps performance on very large inputs.

Where these live

In this browser's localStorage. They do not follow you to another device, because there is no account to carry them.