Spoiler Guard Learning Tool

About

Desktop Spoiler Guard Learning Tool — Reading Ruler & Focus Bar

Hold your place on the page and hide spoilers below while you study, read, or work through exercises. A translucent reading bar follows your cursor, letting you focus on one section at a time without accidentally glimpsing what's below.

FEATURES
• Keyboard shortcut: Alt+X to toggle on/off
• Reading ruler / reading guide bar that follows your mouse
• Adjustable bar height (4 px hairline up to full-screen)
• Adjustable bar darkness (light tint to solid block)
• Settings saved automatically — your preferences persist across all tabs and browser restarts
• Zero permissions beyond what's needed: no browsing history, no data collection

GREAT FOR
• Students working through textbook answers or quiz solutions
• Reading comprehension exercises where you don't want to see the answer
• Coding tutorials — reveal hints one line at a time
• Anyone who loses their place while reading long articles or documentation
• Users with dyslexia or attention difficulties who benefit from a visual reading guide

This extension works like a physical ruler or reading guide held under a line of text — covering the lower half of the page so you can't accidentally read ahead or spoil the ending.

Works on Windows. It may work for Mac and Linux.