The Best Fonts for Dyslexia: What Actually Helps (and What's a Myth)

Choosing the right font will not cure dyslexia, but for many readers it removes small, avoidable friction — letters that look too similar, spacing that’s too tight, or shapes that are harder to distinguish at speed. This guide covers which fonts are commonly recommended, what the evidence actually supports, and how to apply a dyslexia-friendly font to any website without redesigning the page yourself.

What makes a font “dyslexia-friendly”?

Fonts marketed for dyslexia generally aim to reduce letter confusion and increase visual distinction between characters. Common design choices include:

• Weighted bottoms on letters, intended to reduce letter flipping (like confusing “b” and “d”)
• Wider, more open letterforms to reduce visual crowding
• Increased spacing between letters and words
• Distinct shapes for commonly confused pairs, such as “p,” “q,” “b,” and “d”

OpenDyslexic

OpenDyslexic is the most widely known dyslexia-specific typeface. It uses heavier weighting at the bottom of each letter, intended to add a sense of “gravity” that some readers find helps prevent letters from appearing to flip or rotate.

Research on OpenDyslexic’s effectiveness is mixed: some studies show modest improvements in reading speed or subjective comfort for some readers, while others find no significant benefit over well-designed standard fonts. In practice, it’s worth testing rather than assuming — some readers find it noticeably easier, others prefer a plain sans-serif font at a larger size.

Standard fonts that also work well

You don’t need a specialty typeface to read comfortably. Several widely-available fonts are frequently recommended by accessibility guidelines for their clarity:

• Verdana — wide letter spacing and tall x-height (the height of lowercase letters), designed originally for legibility on screens.
• Arial — simple, evenly-spaced sans-serif with few decorative details.
• Tahoma — similar to Verdana with tighter spacing, still comfortably legible.
• Calibri — rounded, modern sans-serif with good screen rendering.

What matters more than font choice

Font family is only one variable. For many readers, these settings make a bigger practical difference:

1. Font size. Larger text reduces the precision needed to distinguish similar letterforms.
2. Line height. Cramped lines make it easy to lose your place; 1.5–2x line height gives your eyes more room to track.
3. Letter spacing. A small positive letter-spacing value can reduce visual crowding, especially in dense paragraphs.
4. Text alignment. Justified text can create uneven word spacing that’s harder to read; left-aligned text keeps spacing consistent.

Combining a comfortable font with generous spacing usually outperforms font choice alone.

How to change fonts on any website you visit

Most websites don’t let you pick your own font, and browser “reader modes” often strip out images, formatting, or navigation you still want. A reading extension solves this by restyling the page you’re already on:

1. Install ReadEase, a free Chrome extension.
2. Open its popup and go to the Type panel.
3. Choose a font style — including OpenDyslexic, Verdana, Arial, Tahoma, Georgia, and others — from the dropdown.
4. Adjust Font Size with the +/- controls, and fine-tune spacing in the Spacing panel.

Your choice applies immediately to the current page and stays set for every site you visit afterward.

Frequently asked questions

Is OpenDyslexic scientifically proven to help with dyslexia?

Evidence is mixed. Some readers report clear benefits; controlled studies have not found a universal effect. It is worth trying, but should not be treated as a guaranteed fix.

What font size is recommended for dyslexia-friendly reading?

There’s no single number that works for everyone, but many accessibility guidelines suggest starting around 18–20px (or roughly 125% of typical browser default) and adjusting from there based on comfort.

Can changing fonts fix reading problems on its own?

Typography changes reduce visual friction, but comprehension support, audio narration (like text-to-speech), and other accommodations often work better in combination than font choice alone.

Does ReadEase change fonts permanently on a website?

No. ReadEase applies your font choice as a temporary style override in your browser only. It does not modify the website itself or affect what other visitors see.