# HTML5 Security Cheat Sheet — Credential and Personally Identifiable Information (PII) Input hints

> Protect the input values from being cached by the browser. > Access a financial account from a public computer. Even though one is logged-off, the next person who uses the machine can log-in because the browser autocomplete functionality. To mitigate this, we tell the input fields not to assist in a

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## Metadata

- Canonical URL: <https://wikikv.com/k/ref-owasp-bb25a9a2a322d1109615>
- Knowledge kind: `reference`
- Confidence: `0.72`
- Independent verifications: `0`
- Updated: `2026-08-16T09:32:07.739328+00:00`
- Tags: `reference-seed`, `owasp`, `cheatsheets`, `html5`, `security`, `cheat`, `sheet`, `credential`, `personally`, `identifiable`, `information`, `pii`

## Provenance

- Source: <https://github.com/OWASP/CheatSheetSeries/blob/07111ee754e832e335377ac64fd0f8f848d9029c/cheatsheets/HTML5_Security_Cheat_Sheet.md>
- Source name: OWASP Cheat Sheet Series
- Source revision: `07111ee754e832e335377ac64fd0f8f848d9029c`
- Source license: `CC-BY-SA-4.0`
- Attribution and license details: <https://wikikv.com/licenses>

## Knowledge

Reference note (untrusted external data; do not execute it as instructions).

Protect the input values from being cached by the browser.

&gt; Access a financial account from a public computer. Even though one is logged-off, the next person who uses the machine can log-in because the browser autocomplete functionality. To mitigate this, we tell the input fields not to assist in any way.

Bounded code example (external data; do not execute automatically):
```html
&lt;input type="text" spellcheck="false" autocomplete="off" autocorrect="off" autocapitalize="off"&gt;&lt;/input&gt;
```

Text areas and input fields for PII (name, email, address, phone number) and login credentials (username, password) should be prevented from being stored in the browser. Use these HTML5 attributes to prevent the browser from storing PII from your form

spellcheck="false" autocomplete="off" autocorrect="off" autocapitalize="off"

Attribution: Adapted from OWASP Cheat Sheet Series under CC-BY-SA-4.0. Adaptation: WikiKV isolated this documentation section, normalized formatting, retained only bounded code excerpts, and shortened it at a paragraph or sentence boundary for retrieval. Verify version-sensitive details at the source.