Overview

DiffPixel is a visual comparison extension for designers and developers. It places local reference images over the current browser page and provides controls for layers, opacity, position, scale, blend modes, and a grid.

Data we do not collect

DiffPixel does not collect, store on external servers, transmit, sell, or share:

• Personal information such as name, email address, or IP address.
• Browsing history, page contents, form input, credentials, or keystrokes.
• Uploaded or pasted reference images.
• Saved layer settings or visual comparison data.

Storage

The extension may store reference images, layer names, position, opacity, scale, blend mode, grid settings, panel position, theme, language preference, and site-level panel visibility in Chrome storage on your device.

This local storage is used only to restore your visual comparison setup and improve day-to-day usability.

Permissions

DiffPixel uses Chrome extension permissions to inject its packaged content script and CSS, display the in-page floating panel, overlay user-provided reference images, and save local settings.

Host access for HTTP, HTTPS, and local file pages is required because DiffPixel works on pages selected by the user, which cannot be known in advance. Local file pages also require the user to enable Chrome's file URL access setting. Host access is used to display the local overlay and restore the panel on pages where DiffPixel has been enabled.

Network

DiffPixel does not use analytics, advertising networks, tracking scripts, external APIs, remote fonts, or remote code. The extension's scripts, styles, and assets are packaged with the extension.

Your control

You can remove saved data by clearing the extension's stored settings in Chrome, removing layers in the panel, or uninstalling the extension.

Contact

For questions about this policy, contact the repository owner through the public GitHub repository.