How to turn off auto-capitalize on iPhone keyboard
The one Settings switch that controls it, why a lone “i” keeps capitalizing even after you flip it, and why some fields never capitalize at all no matter what the switch says.
Start a new message, a new line, or a new sentence after a period and space, and the iPhone capitalizes the next letter for you before you have even typed it. Most of the time that is exactly what you want. Some people do not want it at all — lowercase is the house style for a lot of texting, for usernames, for code snippets, for a deliberately casual tone — and having the phone override it on every single word gets old fast. There is one switch for this, and it does less than people expect, which is worth knowing before you go looking for it.
Where the switch is
- Open Settings → General → Keyboard.
- Find the switch labelled Auto-Capitalization.
- Turn it off.
That is the whole change. It applies immediately, system-wide, to Apple’s own keyboard in every app — Messages, Notes, Mail, Safari, all of it.
Why “i” keeps capitalizing anyway
This is the part that trips people up. Turn Auto-Capitalization off, type a lone “i” as in “i think so”, and it still comes out as “I” in a lot of cases. That is not the switch failing — it is a second feature doing the same-looking thing for a different reason. Sentence-start capitalization is what Auto-Capitalization controls. The standalone pronoun “i” becoming “I” is a word substitution, and word substitutions are Auto-Correction’s job, not Auto-Capitalization’s. Turn off Auto-Correction as well, in that same Settings → General → Keyboard screen, and the lone “i” stops being touched too.
Fields that never auto-capitalize, switch on or off
Some text fields never capitalize the first letter no matter what Settings says, and that is deliberate rather than a bug. An app can mark a field as email, username, URL or password, and iOS treats those as a different category of typing where a forced capital would just be wrong — nobody wants their email address to start with a capital letter because they hit send at the start of a sentence. That instruction comes from the app itself, at the level of that one field, and it overrides the system-wide switch for exactly that field and nowhere else. So a login screen staying lowercase while your Messages thread still capitalizes normally is expected, not inconsistent.
Caps Lock is a separate switch again
Settings → General → Keyboard also has an Enable Caps Lock switch, and it has nothing to do with Auto-Capitalization. With it on, double-tapping Shift locks the keyboard into all-capitals until you tap Shift again. Turning Auto-Capitalization off does not disable this — you can still get a full capitalized line on purpose, you just stop getting single capital letters iOS decided you wanted.
What you give up by turning it off
Auto-Capitalization is a small safety net as much as a style choice. Type fast without watching the screen and it quietly fixes the first letter of every sentence for you; turn it off and a lowercase sentence start stays lowercase until you fix it yourself. That is the whole trade — no downside beyond the one thing it stops doing, so it comes down to whether you actually want that particular correction happening automatically.
Third-party keyboards and this switch
Auto-Capitalization, like Auto-Correction, governs Apple’s own keyboard specifically. A third-party keyboard draws its own keys and typically decides capitalization with its own logic rather than reading that system switch — but it still receives the same per-field hint from the app (this field is a password, this one is an email address), because that hint comes from the text field itself and any keyboard can read it. That is why a login field stays lowercase on a third-party keyboard too, even though the keyboard is not the one checking the Settings screen.
Where Kibo fits
Kibo handles capitalization itself rather than reading the iOS switch, consistent across whichever of its 30 typing languages you have enabled, and it respects the same field-level hint an app sends for a password or username box. None of that needs Full Access — the only place Kibo reads Full Access at all is the Copy word, Copy line and Paste buttons on its toolbar, which need the system clipboard for that one job. It is free to download.
Frequently asked questions
Why does “i” still capitalize after I turn off Auto-Capitalization?
Because that specific fix runs through Auto-Correction, not Auto-Capitalization — they are separate switches in Settings → General → Keyboard. Turn off Auto-Correction too and the standalone “i” stops being touched.
Does turning off Auto-Capitalization also disable Caps Lock?
No. Caps Lock is controlled by a separate Enable Caps Lock switch on the same screen. Double-tapping Shift still locks the keyboard into capitals with Auto-Capitalization off.
Why does my email field never capitalize the first letter, on any keyboard?
The app marked that specific field as an email address, and iOS keeps it lowercase-first regardless of the system-wide Auto-Capitalization switch. This comes from the field itself, so it is the same on Apple’s keyboard and on a third-party one.
Do third-party keyboards use the same Auto-Capitalization switch?
Generally no. Like Auto-Correction, a third-party keyboard usually runs its own capitalization logic, though it still respects the per-field hints an app sends, such as marking a field as a password or username.
Try it on your own keyboard
Kibo is a free custom keyboard for iPhone with real mechanical key sounds, a wardrobe of themes and RGB backlight effects. No account, no ads, and it works with Full Access left off.