Privacy Policy
Last updated: 11 February 2026
This policy describes how steelcalculator.app collects, uses, and protects information when you use the site.
What this site does
Steel Calculator is a static website hosted on Cloudflare Pages. All structural-steel calculations run entirely in your browser using WebAssembly. Your calculation inputs are never sent to a server.
Information we collect
Information you provide voluntarily
If you contact us via the mailto link on the site, we receive your email address, name, and message contents. We use this only to respond to your enquiry.
Analytics (consent-gated)
We use Google Analytics 4 (GA4). The GA4 script loads only after you accept the cookie consent banner. If you decline, no analytics data is collected. When active, GA4 may collect page views, referral source, approximate location, and device/browser attributes. Google processes this data under its own privacy policy.
Local device storage
Calculator inputs may be saved in your browser's localStorage so that values persist between sessions. A service worker caches static assets (HTML, CSS, JS, WASM) for faster page loads. Both are stored on your device only and are not transmitted to us.
How we use information
- To operate the website and serve calculations.
- To understand which pages and calculators are most useful (via GA4, when consented).
- To respond to support enquiries sent by email.
We do not use your data for advertising, profiling, or marketing.
Cookies and similar technologies
The site sets cookies only when you accept the analytics consent banner. These are GA4 cookies used to distinguish unique visitors and sessions. No cookies are set if you decline the banner or do not interact with it.
Third-party services
| Provider | Purpose | Data shared |
|---|---|---|
| Cloudflare Pages | Hosting and CDN | Standard server logs (IP, user agent, timestamps) |
| Google Analytics 4 | Usage analytics (consent-gated) | Page views, referrer, device info, approximate location |
We do not sell, rent, or trade personal information to anyone.
Data retention
- Cloudflare server logs are retained per Cloudflare's standard policy (typically 72 hours).
- GA4 data is retained for the default period configured in Google Analytics (14 or 26 months, depending on the property setting).
- Support emails are retained as long as necessary to resolve the enquiry, then deleted.
Security
All traffic is served over HTTPS/TLS. Because calculations run client-side, your engineering inputs never leave your browser. Cloudflare provides DDoS protection and edge caching. We do not store passwords or personal accounts, so there is no credential database to protect.
International users
The site is hosted on Cloudflare's global CDN, so pages may be served from edge nodes in various countries. Analytics data processed by Google may be transferred internationally under Google's data processing terms. If you are located in the EU/EEA, you may exercise your rights under the GDPR (access, correction, deletion) by contacting us at the email address on the site.
Changes to this policy
We may update this policy from time to time. The "Last updated" date at the top of the page reflects the most recent revision. Continued use of the site after changes constitutes acceptance of the updated policy.
FAQ
Do you collect my calculator inputs? No. All calculations run locally in your browser via WebAssembly. Your inputs are never sent to our servers.
What happens if I decline cookies? Google Analytics does not load at all. The site works identically without it. No tracking cookies are set.
How do I clear stored inputs? Open your browser settings, navigate to site data or storage for steelcalculator.app, and clear it. This removes any localStorage entries and service worker caches.
Do you sell personal data? No. We do not sell, rent, or share personal data with any third party for commercial purposes.
How do I contact you about privacy? Use the contact email linked in the site footer. We aim to respond within a reasonable timeframe.
Is an account required to use the site? No. There are no user accounts, no registration, and no login. All calculators are freely accessible.