Fix Autocorrect Not Working on iPhone

If your iPhone’s autocorrect has stopped fixing typos, capitalizing words, or even suggesting corrections, this guide walks you through the most common fixes. You’ll check settings, restart the keyboard, and clear its learned data — all without losing your personal dictionary unless you choose to.

What You’ll Need

Your iPhone with the latest iOS version (check Settings > General > Software Update).
A few minutes and a stable internet connection (for some steps).
Optional: a backup of your iPhone if you plan to reset all settings.

Step-by-Step

Check the autocorrect toggle. Go to Settings > General > Keyboard. Make sure Auto-Correction is turned on (green). If it’s already on, toggle it off, wait 5 seconds, then toggle it back on. This refreshes the keyboard engine.
Check the “Predictive” toggle. On the same Keyboard screen, ensure Predictive is also on. Autocorrect works best with predictive text enabled, and some users find that turning it off disables autocorrect entirely.
Check per-language settings. If you use multiple keyboards (e.g., English and Spanish), tap Keyboards at the top of the Keyboard screen. Verify that the language you type in is listed and that its Auto-Correction is on. Some language-specific toggles exist.
Restart the keyboard. Sometimes the keyboard process gets stuck. Force-quit the app you’re typing in, then reopen it. If that doesn’t help, restart your iPhone: press and hold the side button and either volume button until the slider appears, then slide to power off. Turn it back on after a minute.
Reset the keyboard dictionary. This clears the words your iPhone has learned (including typos you accidentally taught it). Go to Settings > General > Transfer or Reset iPhone > Reset > Reset Keyboard Dictionary. Enter your passcode and confirm. This does not delete any other data.
Check for a stuck Shift or Caps Lock. If autocorrect isn’t capitalizing “i”, make sure Caps Lock isn’t on (double-tap Shift). Also, if you’re typing in all caps, autocorrect often stops correcting. Try toggling Caps Lock off.
Update iOS. Go to Settings > General > Software Update. If an update is available, install it. Keyboard bugs are often fixed in updates.
Remove and re-add the keyboard. In Settings > General > Keyboard > Keyboards, tap Edit, remove your primary keyboard, then tap Add New Keyboard and select it again. This forces a clean reconfiguration.
Check if “Smart Punctuation” is interfering. On the Keyboard screen, toggle Smart Punctuation off. Some users report it causing autocorrect to skip certain corrections.
Reset all settings (last resort). Go to Settings > General > Transfer or Reset iPhone > Reset > Reset All Settings. This resets Wi-Fi passwords, wallpapers, and other preferences but does not delete your data. You’ll need to re-enter Wi-Fi passwords afterward.

Common Mistakes

Turning off “Predictive” and expecting autocorrect to work fully. While autocorrect can work without predictive, it’s less reliable. Keep Predictive on for best results.
Forgetting to check the language-specific toggle. If you have multiple keyboards, autocorrect might be off for the one you’re using.
Assuming “Reset Keyboard Dictionary” is the same as “Reset All Settings”. They are different. The dictionary reset only clears learned words; the settings reset clears many preferences.
Not restarting the iPhone after changing toggles. A simple restart can apply changes that otherwise seem stuck.
Typing in a text field that has autocorrect disabled. Some apps (like code editors or password fields) disable autocorrect by design. Test in a normal app like Messages or Notes.

Tips

Teach autocorrect new words. When you type a word and it gets underlined in red, tap it and choose “Learn Spelling” to add it to your dictionary.
Use “Replacements” for custom shortcuts. In Settings > General > Keyboard > Text Replacement, you can add shortcuts like “omw” to expand to “On my way!”.
Keep your iPhone updated. Apple regularly improves the keyboard engine in iOS updates.
If autocorrect is too aggressive, turn it off. Some people prefer to disable it entirely and rely on manual corrections. You can always turn it back on.
Clear learned words regularly. If autocorrect starts making weird suggestions, a dictionary reset can help.

Troubleshooting

If the steps above don’t fix the issue, try these additional checks:

Check if the problem is app-specific. Test typing in a different app. If autocorrect works in Notes but not in a specific third-party app, that app may have its own keyboard settings. Look in the app’s settings for a “Disable autocorrect” option.
Check for a hardware keyboard connection. If you have a Bluetooth keyboard paired, autocorrect may behave differently. Disconnect it and test the on-screen keyboard.
Check if “Key Flicks” or “Character Preview” are interfering. These are accessibility features. Go to Settings > Accessibility > Keyboards and ensure they are off.
Restore from a backup. If the problem started after a backup restore, you might have restored a corrupted keyboard setting. Try resetting the keyboard dictionary again, or restore from an older backup.
Contact Apple Support. If nothing works, there might be a hardware issue with the keyboard or a system bug. Apple Support can run diagnostics.

Frequently Asked Questions

Why did autocorrect stop working suddenly?

It could be a temporary glitch, a recent iOS update, or a corrupted learned dictionary. Restarting your iPhone or resetting the keyboard dictionary usually fixes it.

Will resetting the keyboard dictionary delete my saved words?

Yes, it will erase all words you’ve taught autocorrect. However, any text replacements you’ve added under “Text Replacement” will remain.

Why does autocorrect only work in some apps?

Some apps disable autocorrect for security or design reasons (e.g., password fields, code editors). Check the app’s settings or test in a standard app like Notes.

Can I turn off autocorrect completely?

Yes. Go to Settings > General > Keyboard and toggle off Auto-Correction. You can still use predictive text if you want.

Why is autocorrect changing correct words to wrong ones?

This often happens when you’ve accidentally taught it a wrong word. Reset the keyboard dictionary, and be careful when tapping “Learn Spelling” on misspelled words.

Does resetting all settings delete my photos or apps?

No. “Reset All Settings” only resets system preferences like Wi-Fi, Bluetooth, and wallpaper. Your personal data is untouched.

General steps for current mainstream versions; menus can differ by device and version. See the disclaimer or report an error.

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