Built for Every Website & Document
ThemeSwitcher was designed from the ground up to solve the flaws of traditional browser inverters. Here is a deep look into the technologies that power your dark browsing experience.
1. Intelligent Auto Engine (Default)
The Auto Engine operates dynamically on page load. It samples visible DOM elements, analyzes relative background luminance, measures textual vs. media area, and determines whether a site needs CSS recoloring or inversion.
Native Dark Detection
Detects sites that already provide a dark mode (such as YouTube in dark mode or GitHub in night theme) and steps aside automatically so you never suffer double inversion glitches.
Smart Density Profiling
Distinguishes between text-heavy articles, interactive web apps, and media galleries to pick the safest conversion method without user intervention.
2. Layout-Safe CSS Override Engine
The CSS Engine targets individual DOM surfaces, replacing bright backgrounds with your customized dark palette while strictly maintaining element dimensions, margins, and layouts.
Uncompromised Media Quality
Images, SVG artwork, videos, and canvas elements are protected from color corruption. Logos containing black text on transparent backgrounds are intelligently detected and inverted for clarity.
Form & Input Clarity
Buttons, inputs, textareas, and select elements receive calibrated contrast-tested styling so forms remain completely legible and accessible.
3. Local Dark Document & PDF Reader
Reading PDF textbooks, papers, or documentation at night is often excruciating because built-in browser PDF viewers force glaring white page backgrounds.
Canvas Saturation-Aware Conversion
Renders PDF pages directly to HTML5 canvas using bundled PDF.js and calculates pixel luminance to darken backgrounds while preserving chart and illustration hues.
Zero Cloud Uploads
Your documents, contracts, and personal PDFs are parsed 100% locally in your browser sandbox. Nothing is ever uploaded to remote servers.
Markdown, TXT & RTF Support
View raw text documents, Markdown notes, and source files with customizable zoom, contrast sliders, and dark color palettes.
4. Per-Site Customization & Color Memory
Every website is different. ThemeSwitcher gives you the freedom to fine-tune your reading experience per domain.
Color Picker Integration
Choose any base color from the popup. The extension computes harmonious surface, border, and text shades automatically to ensure optimal contrast.
Chrome Sync Persistence
Your chosen engine and background shades sync across your signed-in Chrome devices automatically using Chrome’s native storage API.