Privacy policy

Last updated: 19 October 2026

Dark Mode for Google Sheets is a browser extension that changes how Google Sheets looks. It is built to know as little about you as possible.

What it collects

Nothing. It has no servers, no analytics, no crash reporting and no tracking. It makes no network requests of any kind.

What it stores

Your settings, and only your settings, in your browser's own extension storage (chrome.storage.sync): whether dark mode is on, which theme you picked, whether to follow your computer's appearance, how charts are treated, a list of sheet IDs you chose to keep light or dark, and the name of the font you chose, if any. If you use Chrome sync, Chrome syncs these settings between your own browsers.

The extension also mirrors the on/off state, theme and font name into the Google Sheets page's local storage under the key nightcell:state:v1, so a sheet opens dark without a flash of white, and keeps which weights of your chosen font are installed under nightcell:faces:v1, so a sheet opens in your font straight away. Nothing else is stored.

What it can see

It runs only on docs.google.com/spreadsheets. To recolour the grid it changes the colours, and if you chose a font the font names, that Google Sheets passes to the drawing canvas. It does not read, copy, store or send the text or numbers in your cells, and it never sees your Google account details.

If you choose a font, the extension checks whether it is installed by asking the browser to load that one name from your computer. It never lists, reads or uploads your other fonts.

Permissions

• storage: to save your settings.
• Access to https://docs.google.com/spreadsheets/*: to apply the theme there.

Changes and contact

If this policy ever changes, the new version will be published here with a new date. Questions: open an issue at github.com/TheHardikDewra/sheets-dark-mode/issues or email admin@wedesignlandingpages.com.