Change font size in Settings
The fastest way to change how large or small text appears across your iPhone is through the Display & Brightness settings. This affects text in Mail, Messages, Notes, and most built-in apps. Open Settings, then tap Display & Brightness. Scroll down until you see Text Size with a slider underneath it.
Drag the slider to the right to make text larger, or to the left to make it smaller. You'll see a preview of the change right above the slider — the word "A" gets bigger or smaller as you move it. When the size looks right, tap the back arrow or swipe back to exit Settings. The change takes effect immediately on most screens.
This method works for any app that uses the system font size. If you change it and then open Mail or Messages, the text will be the new size you chose. Some apps like Safari or Chrome have their own text size controls that override this setting, so you may need to adjust those separately.
Key Takeaways
- Go to Settings, then Display & Brightness, then Text Size to adjust how large text appears across your iPhone.
- Drag the slider right to enlarge text or left to shrink it, and watch the preview change as you move it.
- Some apps like Safari and Chrome have their own text size controls that work independently of the system setting.
- If you need text even larger than the maximum slider allows, turn on Larger Accessibility Sizes for additional options.
- You can also make individual app text larger by pinching outward with two fingers on the screen in many apps.
Use Larger Accessibility Sizes for maximum enlargement
If the Text Size slider doesn't go large enough, your iPhone has a second layer of size options called Larger Accessibility Sizes. This setting unlocks even bigger text than the standard slider allows. Go to Settings, then Accessibility, then Display & Text Size.
Toggle on Larger Accessibility Sizes. When you do, the Text Size slider in Display & Brightness will expand to show many more size options — sometimes up to seven or eight steps larger than before. Slide it to whatever size you need. This works in the same apps as the regular Text Size setting, but gives you much more range.
Be aware that very large text sizes can make some screens feel cramped, and you may need to scroll more to see full content. If you find the text is now too large, you can always go back to Accessibility and turn off Larger Accessibility Sizes, which will reset the slider to its normal range.
Zoom in on specific apps using pinch gestures
Many iPhone apps let you make text larger just in that app by using a two-finger pinch. Open the app, place two fingers on the text you want to enlarge, and pinch outward (spread your fingers apart). The text will zoom in. Pinch inward (bring your fingers together) to zoom back out.
This works in Mail, Notes, Safari, and many third-party apps, but not all of them. If pinching doesn't work in an app you're using, that app may have its own text size menu instead. Look for a settings icon or menu button within the app itself — often three horizontal lines or a gear icon — and search for text size or font options there.
The pinch zoom is temporary and resets when you close the app or navigate to a different screen. It's useful when you need to read something quickly without changing your system-wide settings.
Adjust text size in Safari and web browsers
Safari and other web browsers like Chrome have their own text size controls separate from your iPhone's system setting. In Safari, open the website you want to read, then tap the aA button in the top right corner of the address bar. A menu will appear with a small "A" and a large "A" — tap the large A to make text bigger, or the small A to make it smaller.
You can also pinch outward on any webpage to zoom in, just like in other apps. This zoom stays in place until you pinch back out or close Safari. If you use Chrome, tap the three dots in the bottom right, then Settings, then Accessibility, and adjust the text scaling slider there.
These browser-specific settings override your system Text Size, so if you've set a large font size in Settings but websites still look small, check Safari's aA menu or your browser's own text size options.
Make text bold for better contrast
If you want text to stand out more without necessarily making it larger, you can turn on Bold Text. Go to Settings, then Accessibility, then Display & Text Size, and toggle on Bold Text. Your iPhone will restart, and when it comes back on, all system text will appear bolder and darker.
Bold text can make reading easier even if the size stays the same, because the thicker letters have more contrast against the background. You can combine this with a larger text size for maximum readability. If you change your mind, go back to the same menu and toggle it off — your iPhone will restart again and return to normal text weight.
Troubleshoot when text size won't change
If you've moved the Text Size slider but text in an app hasn't changed, the app likely has its own text size control. Close the app completely — swipe up from the bottom of the screen and hold on the app's preview, then tap Remove. Open the app again and look for a settings menu inside it. Many apps like Kindle, Medium, or news readers have text size buttons you must adjust separately from your system settings.
If text size changes in some apps but not others, this is normal. System-wide text size affects built-in apps and apps that follow Apple's design guidelines, but not all third-party apps. Check inside each app's own settings or menu for text size options.
If you've turned on Larger Accessibility Sizes but the slider still doesn't show more options, restart your iPhone. Go to Settings, then General, then Shut Down, wait a few seconds, then press and hold the side button to turn it back on. After restart, the full range of sizes should appear.
Frequently Asked Questions
Can I make text bigger in iMessage or text messages?
Yes. The Text Size setting in Display & Brightness controls message text. If that's not large enough, turn on Larger Accessibility Sizes in Settings > Accessibility > Display & Text Size for even bigger options. You can also pinch outward on a conversation thread to zoom in temporarily.
Will changing text size affect my battery life?
No. Text size has no meaningful impact on battery life. Making text bold uses slightly more power than regular text, but the difference is too small to notice in daily use.
What's the difference between Text Size and Larger Accessibility Sizes?
Text Size is the standard slider that covers most everyday needs. Larger Accessibility Sizes unlocks additional, much larger sizes beyond what the regular slider offers. You can use both together — turn on Larger Accessibility Sizes, then adjust the Text Size slider to any size in the expanded range.
Can I change font size on my lock screen?
The lock screen time and notifications use the system text size you set in Display & Brightness, but you cannot adjust them independently. If you want lock screen text larger, increase your overall Text Size setting.
Why does text look small again after I restart my iPhone?
It shouldn't. Text size settings stay in place after a restart. If text appears smaller, check that you didn't accidentally move the Text Size slider back, or that Larger Accessibility Sizes didn't get turned off. Go back to Settings > Display & Brightness > Text Size to confirm your choice is still there.