Why Accessible Fonts Matter for Web Design

What Makes a Font Accessible?

An accessible font is one that people can read quickly and accurately, including people with low vision, dyslexia, or cognitive disabilities. The difference comes down to letterforms. Characters like capital I, lowercase l, and the number 1 should look clearly different from each other. A large x-height, open letter shapes, and even stroke thickness also help readers recognize words at a glance.

Does WCAG Require a Specific Font?

No. WCAG does not name or ban any typeface. Instead, it sets requirements for how text behaves. Text must stay readable when users enlarge it to 200%, it must keep working when users increase letter and line spacing, and it must meet minimum color contrast. In practice, this means the font matters less than how you size, space, and color it.

Key Features of Readable Fonts

When comparing fonts, these features have the biggest effect on readability:

• Distinct letterforms: Characters such as I, l, and 1, or O and 0, should not be confused with each other. Confusable shapes slow down every reader and can cause errors in codes, prices, or email addresses.
• Generous x-height: Taller lowercase letters stay legible at smaller sizes, which matters most on mobile screens.
• Open apertures: Letters like c, e, and a should have open shapes. Closed shapes blur together for readers with low vision.
• Moderate stroke contrast: Very thin strokes disappear at small sizes or on low-quality screens, so even strokes are safer for body text.
• Clear spacing: Letters that sit too close together, such as “rn” looking like “m”, create misreadings.

Best Accessible Fonts for the Web

Several widely used fonts combine these features well:

• Atkinson Hyperlegible: Developed by the Braille Institute for readers with low vision. It deliberately exaggerates the differences between similar characters, and it is free to use.
• Verdana: Designed for screens, with wide letters and generous spacing. It works well for body text, although it takes up more horizontal space.
• Tahoma: Similar to Verdana but narrower, which makes it useful where space is limited.
• Lexend: Designed with reading fluency in mind, with adjustable width options to suit different readers.
• Open Sans: A common, neutral choice with open letter shapes and broad language support.
• Inter: Built for user interfaces, with a tall x-height that stays clear at small sizes.

No single font works best for everyone. Test your shortlist with real content, at real sizes, on the devices your users rely on.

Are Dyslexia Fonts Worth Using?

Fonts designed for dyslexia, such as OpenDyslexic, help some readers follow text more comfortably. Research has not shown that they improve reading for everyone, but many users still find them easier on a personal level. The best approach is to keep your default font readable and offer a dyslexia font as an option for users who want it. That way, you leave room for personal preference without forcing one solution on everyone.

Font Size, Spacing, and Line Length

Font choice works only when it comes with good typography settings. Use relative units such as rem, so text scales when users change their browser settings. A body size around 16px is a common starting point, though WCAG does not set a minimum. Line spacing of about 1.5 times the font size and lines of roughly 80 characters or fewer make long text easier to follow.

Fonts to Avoid for Body Text

Some styles create barriers, especially in longer text. Decorative, script, and handwriting fonts make letters hard to distinguish. Very thin or condensed weights lose detail at small sizes. Long passages in all caps or italics are harder to read because they remove the word shapes readers rely on. Save these styles for short headings or logos, not paragraphs.

Accessible Fonts Beyond English

If your site serves multiple languages, check that the font supports every character you need. A font that lacks Turkish characters like ğ and ş, or Arabic script, will fall back to a different system font. That mix of typefaces breaks visual consistency and can reduce readability. For right-to-left languages, use a font designed for that script rather than relying on fallbacks.

How to Test Font Accessibility

Testing shows whether a font works in your actual design. Zoom pages to 200% and check that nothing overlaps or gets cut off. Apply increased letter and line spacing to confirm the layout holds. Check contrast between text and background with a contrast checker. Where possible, ask people with low vision or dyslexia to read real content and share what slows them down.

How WeAccess Supports Readable Typography

WeAccess helps organizations find and fix readability issues as part of broader accessibility work. Accessibility Scan helps detect problems such as low contrast across your pages. The Accessibility Widget lets visitors adjust font size, spacing, and other display settings to match their own needs. Automated tools work best alongside manual review, so talk to our accessibility experts if you want a closer look at your typography.