Two fonts dominate the dyslexia accessibility conversation in 2026: Lexend and OpenDyslexic. Both are free, both are widely recommended for dyslexic readers, and both are available on any website via FocusFlow. But they work in completely different ways — and choosing the wrong one can make reading harder, not easier.
This is a complete, research-backed comparison to help you choose.
The Core Difference in One Sentence
OpenDyslexic prevents letters from looking like their mirrored twins. Lexend prevents letters from crowding each other out.
If your reading problem is letter confusion (b looks like d, p looks like q), OpenDyslexic addresses the root cause. If your reading problem is slow, laborious reading or visual fatigue, Lexend is the stronger tool.
Most people with dyslexia benefit from one more than the other — but it's personal, and the only reliable way to know is to try both.
What Is OpenDyslexic?
OpenDyslexic was designed by Abelardo Gonzalez and released open-source in 2011. The key design decision: make every letter bottom-heavy. Each character has exaggerated weight at its base, creating a strong visual "gravity" that resists the brain's tendency to flip or rotate letter shapes.
How it works
The human brain processes letters by recognising shape, not by absolute orientation. For most readers, this is helpful (you can read upside-down text with effort). For dyslexic readers, it becomes a problem — the brain fails to distinguish "b" from "d" or "p" from "q" because they're the same shape rotated. OpenDyslexic's weighted bottoms give each letter a clear top and bottom, making mirroring impossible.
Research evidence
A 2013 study by Rello & Baeza-Yates (CHI 2013) tested OpenDyslexic against Arial and other fonts. Results were mixed: reading speed didn't consistently improve, but readers preferred OpenDyslexic and made fewer errors on specific character pairs. A key finding was that results varied significantly between individuals — some readers improved substantially; others didn't. This strongly suggests trying it personally rather than relying on group averages.
Best for
- Readers who frequently confuse mirror-image letter pairs: b/d, p/q, n/u
- Readers with diagnosed dyslexia who have confirmed letter-reversal issues
- Children learning to read with dyslexia
- Readers who have tried other fonts and still confuse specific characters
The tradeoff
OpenDyslexic looks visually unusual compared to standard fonts. There's typically a 1–2 week adjustment period where reading feels slower before it becomes faster. Some readers find it tiring on long articles because the unconventional shapes require more conscious processing. Its benefits are most pronounced on short-to-medium reading lengths.
What Is Lexend?
Lexend is a font family created by educational therapist Bonnie Shaver-Troup and subsequently validated through research at Vanderbilt University. Its design insight is simpler: most reading difficulty isn't about letter shape — it's about letter spacing. Visual crowding (where adjacent letters interfere with each other's recognition) is one of the most consistently documented barriers in dyslexia research.
How it works
Lexend systematically increases the horizontal spacing between letters and within letters (the counters — the open spaces inside characters like "a", "o", "e"). This reduces visual crowding without making the font look unusual. The result is a font that feels like a normal, clean modern sans-serif — but performs better for crowding-sensitive readers.
Lexend is a variable font family with multiple widths:
- Lexend Deca (narrowest, recommended starting point)
- Lexend Exa (wider)
- Lexend Giga (widest)
- And several widths in between
Most readers do well with Lexend Deca or the standard Lexend. If crowding is severe, Lexend Giga provides maximum letter separation.
Research evidence
Vanderbilt University studies showed measurable improvements in reading speed when Lexend replaced standard fonts like Times New Roman and Arial. Unlike OpenDyslexic, Lexend's benefits were more consistent across different reader profiles — including readers without dyslexia. It is now included in Google Fonts as an official accessibility font and is recommended by multiple dyslexia and reading organisations.
Best for
- Readers with dyslexia who don't specifically struggle with letter flipping (b/d confusion) but find reading slow and tiring
- Readers with visual crowding — where letters seem to bleed together in a block of text
- Readers with ADHD who benefit from clearer visual separation between words
- Readers who want a font that doesn't announce itself as "different" — useful in professional or academic settings
- Anyone who has tried OpenDyslexic but found it uncomfortable
The tradeoff
Lexend doesn't specifically address letter-reversal issues. If your primary challenge is confusing mirrored characters (b/d, p/q), Lexend's improved spacing won't solve it — you need OpenDyslexic or Atkinson Hyperlegible's distinct letterforms instead.
Lexend vs OpenDyslexic: Direct Comparison
| Lexend | OpenDyslexic | |
|---|---|---|
| Primary mechanism | Wider letter spacing → reduces crowding | Weighted bottoms → resists letter flipping |
| Designed for | Reading fluency (all readers) | Letter-reversal dyslexia specifically |
| Looks like | Normal clean sans-serif | Visually distinctive, unconventional |
| Adjustment period | None | 1–2 weeks |
| Best for long reading? | Yes — spacing helps over time | Mixed — some readers tire faster |
| Best for letter confusion? | No (doesn't change letter shapes) | Yes (explicitly addresses b/d, p/q) |
| Works for ADHD? | Yes — reduced crowding aids focus | Varies — unusual shapes can distract |
| Research consistency | Consistent across reader groups | Variable — works well for some, not others |
| Available in Google Fonts? | Yes | No (open-source, not in GFonts) |
| Available in FocusFlow? | Yes | Yes |
Which One Should You Choose?
Choose OpenDyslexic if:
- You frequently read "d" as "b" or "p" as "q"
- You have formally diagnosed dyslexia with confirmed letter-reversal symptoms
- You're a parent or teacher helping a child with dyslexia learn to read
- You've tried standard fonts extensively and still struggle with specific character pairs
- You're willing to commit to a 2-week adjustment period
Choose Lexend if:
- Reading feels slow and exhausting but you don't frequently confuse mirrored letters
- Letters seem to "crowd" or blur together in blocks of text
- You want a font that looks professional and doesn't draw attention
- You have ADHD alongside dyslexia (Lexend's clear spacing helps with attention)
- You've tried OpenDyslexic and found the visual style distracting or uncomfortable
Use both if:
You use different reading environments for different content. FocusFlow's per-site typography feature lets you set Lexend on your regular news reading and OpenDyslexic on academic or dense text — without switching anything manually.
How to Try Both for Free on Any Website
Neither font choice should be permanent. The best way to choose is to read 15 minutes of your typical content in each font and compare the experience.
FocusFlow is a free Chrome extension that lets you:
- Switch between Lexend, OpenDyslexic, and Atkinson Hyperlegible on any website in one click
- Adjust font size, line height, letter spacing, and word spacing to fine-tune either font
- Save different settings for different websites automatically
You can install it and start testing right now — no account required.
What About Atkinson Hyperlegible?
Atkinson Hyperlegible is the third major accessibility font worth knowing. Where Lexend addresses crowding and OpenDyslexic addresses letter flipping, Atkinson Hyperlegible addresses character ambiguity — making every character look as different from every other character as possible.
It's particularly powerful for readers who confuse I/l/1, O/0, or rn/m — and for reading on small screens where spacing-based solutions have less impact.
Frequently Asked Questions
Is Lexend better than OpenDyslexic for dyslexia?
Neither is universally better — they solve different problems. Lexend is better for reading speed and fluency, particularly for visual crowding. OpenDyslexic is better for letter-reversal dyslexia (b/d, p/q confusion). Most dyslexic readers find that one works significantly better for their specific challenges — the only way to know is to try both.
Is OpenDyslexic actually proven to work?
Research is mixed. A 2013 CHI study found that dyslexic readers made fewer errors and preferred OpenDyslexic over Arial, but reading speed didn't improve significantly. A key finding was that results varied widely between individuals — some readers improved a lot, others didn't. This doesn't mean it doesn't work; it means it works for some people and not others, which is why personal testing matters.
What font is best for dyslexia and ADHD?
For combined dyslexia and ADHD, Lexend is usually the better starting point — its improved spacing helps with both reading clarity and visual attention. OpenDyslexic's unusual appearance can be distracting for some ADHD readers. That said, some ADHD readers find OpenDyslexic's strong visual anchoring actually helps them stay on the correct letter. Try both.
Can I use Lexend and OpenDyslexic in Google Docs?
Yes, in your own documents. Lexend is available in Google Docs via "More fonts" → search "Lexend", and OpenDyslexic can be added via the Extensis Fonts add-on in Google Workspace. If you're reading a document you can't edit, note that Google Docs renders text onto a <canvas>, so browser extensions can't restyle it in place — instead, copy the text into the free FocusFlow Online Reader and apply either font with adjustable spacing there.
Does the British Dyslexia Association recommend OpenDyslexic?
The BDA acknowledges OpenDyslexic as a purpose-built dyslexia font but notes that research results are mixed. Their style guide recommends fonts with "sufficient space between letters and words" — which both Lexend and OpenDyslexic address in different ways. They don't endorse a single font as the definitive answer, emphasising that individual preference matters most.