Welcome to LexiCipher
Discover the typography settings that work best for your brain.
📖 What is LexiCipher?
LexiCipher is a free, science-based tool that helps you find your optimal reading settings. Instead of guessing which font or spacing works best, our test uses Design of Experiments (DOE) methodology to systematically identify what actually helps you read more comfortably.
Every person's brain is different. What works for one reader may not work for another. That's why we test 7 different typography factors to find your unique combination.
📚 View the research citations →🔬 How the Test Works
Quick Setup
Tell us your reading level and optionally calibrate for your screen size.
16 Reading Comparisons
Read short passages and rate each one compared to a reference. Takes about 10-15 minutes.
Statistical Analysis
We analyze your responses to identify which factors significantly affect your reading comfort.
Get Your Settings
Download a personalized font file and CSS settings to use everywhere you read.
🎛️ What We Test
📏 Calibrated Reading Passages
All test passages are professionally calibrated using the Flesch-Kincaid readability formula to ensure consistent difficulty across the test.
You'll read passages 2 grade levels below your selected level for comfortable, focused testing.
🔒 Your Privacy
All data stays on your device. We don't collect, store, or transmit any personal information. Your reading preferences are saved in your browser's local storage and can be deleted anytime.
Free • 10-15 minutes • No account required