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Claude's Default Font Is a Problem — Here's How to Change It

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I use Claude every day. It is one of the most useful tools I have found for managing the parts of my work that dyslexia makes harder — drafting, summarising, catching errors I would otherwise miss.

Which makes it frustrating that the default font is Anthropic Serif.

For a tool built to help people, choosing a serif font as the default is a strange choice.

How to change it on desktop

The setting exists, but it is not where you would expect. It took me a few attempts to find it.

  1. Open claude.ai in your browser
  2. Click your profile icon in the bottom left
  3. Go to Settings
  4. Select General
  5. Scroll down to Preferences
  6. Under Chat font, switch from Anthropic Serif. Anthropic Sans is the safe choice, but there is also a Dyslexic friendly option.

It is a small change, but the difference over a long session is real.

The app is a different problem

The mobile app does not offer this option at all. There is no font setting — you get Anthropic Serif and that is it.

The Claude iOS app's Settings screen, showing only an Appearance section with Light, Dark, and System theme options — no chat font setting anywhere.
The native app's Settings — Appearance controls the theme, but there's no Chat font option at all.

Skip the app. Open claude.ai in your phone or tablet's browser instead — the font setting is there too.

claude.ai open in a phone's browser, with the Chat font dropdown open showing four options: Anthropic Serif, Anthropic Sans, System, and Dyslexic friendly.
The same Chat font setting, open in a phone browser instead of the app — Anthropic Sans selected here.

One thing to watch for: avoid opening claude.ai in Safari if you can help it. Anthropic has the site set up to trigger Safari's native app banner — which here means nudging you toward the one client that is missing the setting you're trying to change. Brave does not show it, which is the main reason these screenshots were taken there instead.

claude.ai open in Safari on a phone, with a banner across the top urging you to "Open in the Claude app" — the exact app that lacks the Chat font setting.
Safari's own banner, nudging you toward the one version of Claude that does not have this setting.

This shouldn't be necessary

I pay for Claude. A lot of people with disabilities do, because it is genuinely useful in ways that free tools often are not. Dyslexia, Attention-Deficit/Hyperactivity Disorder (ADHD), low vision, cognitive differences — these are exactly the conditions that make a tool like Claude worth paying for. They are also the conditions most affected by poor typographic choices.

Generative AI has real potential as an accessibility tool. I have seen that firsthand. But that potential is harder to reach when the interface gets in the way — like a serif default you can't change on mobile.

A sans-serif default and a font setting in the app would not be a difficult fix. It just needs to be treated as worth doing.