HTML · ATTRIBUTE

HTML autocapitalize Attribute: Control Mobile Auto-Caps

Last reviewed November 3, 2026

autocapitalize is a global attribute that hints how a mobile virtual keyboard capitalizes letters while the visitor types. Valid values include off and none (no auto-caps), on and sentences (capitalize the first letter of each sentence), words (capitalize each word) and characters (capitalize every letter). It is inherited from parent elements such as <form>, changes only the keyboard behavior, not the submitted value, and desktop browsers ignore it.

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autocapitalize-example.html

<input type="text" name="username" autocapitalize="off" spellcheck="false" autocomplete="username">

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HTML autocapitalize Attribute code you can paste today.

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autocapitalize.html

<form action="https://splitforms.com/api/submit" method="POST">
  <input type="hidden" name="access_key" value="YOUR_ACCESS_KEY">

  <label for="name">Full name</label>
  <input type="text" id="name" name="name" autocapitalize="words" autocomplete="name" required>

  <label for="username">Username</label>
  <input type="text" id="username" name="username" autocapitalize="off" spellcheck="false" autocomplete="username" required>

  <label for="email">Email</label>
  <input type="email" id="email" name="email" autocomplete="email" required>

  <label for="promo">Promo code</label>
  <input type="text" id="promo" name="promo" autocapitalize="off" spellcheck="false" autocorrect="off" pattern="[A-Za-z0-9]+">

  <!-- Honeypot: hidden from people, bots fill it in -->
  <input type="checkbox" name="botcheck" style="display:none" tabindex="-1" autocomplete="off">

  <button type="submit">Sign up</button>
</form>

autocapitalize values

What does each autocapitalize value do on a mobile keyboard?

Each value tells the virtual keyboard how aggressively to shift letters to uppercase while typing. Pairs like off and none, or on and sentences, mean the same thing in HTML.

What does each autocapitalize value do on a mobile keyboard?
Value	Keyboard behavior	Typical use
`off` or `none`	No automatic capitalization	Usernames, emails, promo codes, URLs, search queries
`on` or `sentences`	Capitalize the first letter of each sentence (default on many text fields)	Comments, messages, ordinary paragraphs
`words`	Capitalize the first letter of each word	Names and titles where Title Case is expected
`characters`	Capitalize every letter as typed	All-caps codes or fields where every character should stay uppercase

Browsers may still apply their own defaults when the attribute is omitted. Set it explicitly on sensitive fields.

Sources: MDN: autocapitalize

Attributes · autocapitalize

Which attributes go with autocapitalize?

autocapitalize shapes mobile capitalization. These attributes handle spell check, autocorrect and autofill alongside it.

HTML autocapitalize Attribute attributes and what each one does
Attribute	What it does	Docs
`autocapitalize="off" or "none"`	Disables automatic capitalization on the mobile keyboard for this field.	MDN
`autocapitalize="on" or "sentences"`	Capitalizes the first letter of each sentence as the visitor types (common default).	MDN
`autocapitalize="words"`	Capitalizes the first letter of each word on the virtual keyboard.	MDN
`autocapitalize="characters"`	Shifts every typed letter to uppercase on the mobile keyboard.	MDN
`autocorrect`	Non-standard on iOS Safari; pair `autocorrect="off"` with `autocapitalize="off"` to stop auto-fix on codes and usernames.	MDN
`spellcheck`	Controls red underlines separately from capitalization; use `spellcheck="false"` on codes and usernames.	MDN

Common mistakes

autocapitalize mistakes to avoid

Most issues come from expecting desktop changes, trusting the keyboard to validate data, or forgetting inheritance from <form>.

Where it works
autocapitalize applies to <input type="text">, type="search", type="tel">, <textarea> and contenteditable regions. Browsers ignore it on <input type="email">, type="url"> and type="password"> because those types already define their own keyboard behavior.
Inheritance from <form>
Like spellcheck, autocapitalize inherits from ancestor elements. Adding autocapitalize="off" on the <form> sets the default for every text control inside unless a field overrides it with its own attribute.
Turn it off for usernames, emails, promo codes and URLs
Mobile keyboards love to capitalize the first letter of every field, which breaks usernames, coupon codes and exact URLs. Set autocapitalize="off" (or none) on those controls and pair it with spellcheck="false" and autocorrect="off" on iOS Safari so underlines, substitutions and caps all stay off.
It only changes the keyboard, not the value: normalise on the server
Visitors can still paste lowercase text or turn caps lock on. autocapitalize never validates or transforms the submitted string. Trim, fold case and validate usernames, emails and codes again on the server.
Desktop browsers ignore it
Physical keyboards do not read autocapitalize. Test capitalization hints on real phones; on laptops the attribute has no visible effect.

Sources: WHATWG HTML Standard: Autocapitalization · MDN: autocapitalize

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The HTML autocapitalize Attribute example below is a complete, working form — paste it into any HTML page and it submits, no edits to the markup required.

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How it works

How to add HTML autocapitalize Attribute to any page.

Copy the html autocapitalize attribute example, drop in your free access key, and paste it into any page — submissions start landing in your dashboard.

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Copy the HTML autocapitalize Attribute example below.

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Questions

HTML autocapitalize Attribute questions, answered.

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What is the difference between autocapitalize off and none?

They mean the same thing in HTML: the mobile keyboard should not automatically capitalize letters. Use either value; off is more common in examples.

How do I stop my iPhone from capitalizing the first letter in every input?

Add autocapitalize="off" to the input (or to the whole form). For usernames and promo codes, also set spellcheck="false" and autocorrect="off" so Safari stops auto-fixing text.

Does autocapitalize work on input type=email?

No. Browsers ignore autocapitalize on type=email, type=url and type=password because those types already pick a specialized keyboard. Use the correct input type; you do not need a separate hint.

Can I set autocapitalize on the whole form?

Yes. Put autocapitalize="sentences" or autocapitalize="off" on the <form> element and every inheriting text field follows unless it sets its own value.

How do I use autocapitalize in React?

Use the camelCase prop autoCapitalize on <input> and <textarea>, for example <input autoCapitalize="off" />. It maps to the same HTML attribute.

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