Air-Gapped PrivacyLast Updated: October 2026

Privacy Policy: Your Text Never Leaves Your Device

We believe web utilities should work like local terminal software. When you paste sensitive code, legal drafts, or private messages into Capital Letter Converter, zero bytes are transmitted across the internet.

1. The Core Principle: 100% Client-Side In-Memory Execution

CapitalLetterConverter.com operates on a strict zero-server architecture for text processing. Every case conversion—whether UPPERCASE, Title Case, Sentence case, or Small Caps—takes place purely within your web browser’s JavaScript sandbox.

When you type, paste, or drop a text file onto our editor:

Your input is allocated directly into your device's temporary volatile memory (RAM).
No HTTP POST, WebSocket, or API payload containing your text is ever dispatched to our servers or any third-party infrastructure.
Closing your browser tab immediately purges your text from browser memory.

2. Information We Never Collect

We take a simple approach to data collection: if we do not need it to convert characters, we refuse to touch it.

No Document TextWe never store, inspect, train AI models on, or analyze whatever text you paste.

No Personal IdentificationWe require no accounts, no email signups, no phone numbers, and no authentication credentials.

No Keystroke TelemetryWe do not track typing speeds, pauses, or clipboard history.

No Cross-Site Ad TrackingWe run zero ad networks, zero pixel trackers, and zero fingerprinting scripts.

3. Local Storage Usage

We use your browser’s native localStorage for exactly one setting:

key: "theme" • values: "light" | "dark"

This key stores your preferred visual theme so the website doesn’t flash white when you open it in dark mode. It contains zero identifiable user data and never gets sent to any server. You can clear your browser storage at any time to delete it.

4. External Assets & Fonts

To deliver clean typography without shipping massive font binaries in initial payloads, we load the Geist font family via Google Fonts. When your browser requests font stylesheets, your IP address is received by Google’s edge servers as part of standard HTTP delivery. Google does not set cookies for font assets.

5. GDPR, CCPA & International Compliance

Under privacy regulations such as the European Union General Data Protection Regulation (GDPR) and the California Consumer Privacy Act (CCPA), individuals have rights regarding the access, correction, and deletion of personal data.

Because we do not collect, process, retain, or share personal data, we do not maintain databases of user records. There is nothing to export, nothing to correct, and nothing to delete. We cannot sell your data because we have none.

6. Changes to This Privacy Statement

We may update this policy occasionally to reflect infrastructure changes or browser standards. Any adjustments will be published immediately on this page with an updated timestamp.

Have Questions About Our Privacy Practices?

If you have questions about how our client-side converter manages security or browser sandboxing, reach out directly at info@capitalletterconverter.com.