Free Font Readability Score: Catch Text That Strains Eyes
Measure how easy your fonts are to read in seconds. Get a clear score plus specific sizing, spacing, and line-length fixes for every hard-to-read block.
One Clear Readability Score
Your typography gets a single score, so you know at a glance whether your text helps or hurts.
Sizing and Spacing Checks
Catch tiny font sizes, cramped line height, and lines that run too long to scan comfortably.
Mobile Text Included
See how your type holds up on small screens, where tight sizing and spacing hurt readers most.
A font readability score grades how effortless your text is to read by measuring the factors that govern legibility: font size, line height, line length, letter spacing, and contrast with the background. It combines these into a single, comparable number and points out the settings that slow readers down. Rather than trusting that a design feels clean, you get concrete signals about whether visitors can scan and absorb your words.
What the Font Readability Score Evaluates
The font readability score inspects the mechanics of your type rather than its style. It checks whether body text sits near a comfortable size, whether line height gives letters room to breathe, and whether lines are short enough to track without losing your place. It also weighs letter and word spacing and the contrast between text and background. Each factor carries a weight because they interact: tight leading hurts more on long lines, and small type suffers most in low contrast. The result is a score plus a breakdown showing which specific setting is dragging legibility down.
How to Read and Improve Your Score
Treat the breakdown as a checklist ordered by impact. If size is the weak point, raise body copy toward a range that stays comfortable on phones without zooming. If lines run long, cap their width so the eye returns cleanly to the next line. Loosen line height when paragraphs feel dense, and reserve tight tracking for short headings only. Recheck after each adjustment, since fixing one factor often lifts the whole score. The goal is not a perfect number but text that a tired reader on a small screen can move through without effort or fatigue.
Why Readable Type Supports Rankings
Legible type keeps people reading, and longer, calmer sessions send positive signals to search engines about content quality. When text is hard to parse, visitors bounce before your message or keywords ever register, and thin engagement follows. Readability also shapes how well your content performs on mobile, where most searches now happen and cramped type does the most damage. Clear, well-spaced copy makes your headings and body text easier for both readers and crawlers to interpret. Strong readability will not rank a weak page alone, but poor readability quietly undermines even excellent writing.
Frequently Asked Questions
What font size should body text be in 2026?
For most sites, 16px is the practical minimum for body text, with around 1.5 line height and 45 to 75 characters per line. The score flags anything below those thresholds and shows exactly which elements to fix.
What factors go into the Font Readability Score?
The score weighs font size, line height, line length, and letter spacing across your page, then combines them into one rating with a breakdown you can act on element by element.
Is the Font Readability Score free?
Yes. The tool is free once you create a Brainito account. Score any page, adjust your typography, and run it again to confirm reading actually got easier for your visitors.
Score your fonts for readability and fix eye strain in minutes
One account unlocks font readability score plus 340+ marketing tools, weekly audits, and your action plan.
More Conversion & UX tools
Browse all 340+ tools3-Second Test Tool
Check if visitors grasp your offer in three seconds and see what confuses them first
Above-the-Fold Analyzer
Analyze everything visitors see before scrolling and fix the gaps costing you clicks
Button Effectiveness Analyzer
Score your buttons on copy, size, and contrast to see which ones stall clicks
CTA Analyzer
Grade your calls to action on wording, urgency, and clarity to win more clicks
CTA Placement Checker
Spot CTAs buried below the fold and place every button where visitors actually look
Color Contrast Checker
Test your color pairs against accessibility standards so every visitor reads with ease