Privacy Policy
Last Updated: August 27, 2026
SJ AI Studio ("we", "us", "our") operates sjaistudio.com. This page informs you of our policies regarding the collection, use, and disclosure of personal data when you use our website.
Information We Collect
Our tools run entirely in your browser. We do not collect, store, or transmit any personal data you enter into our calculators and tools. All calculations happen client-side (on your device).
- No Account Required: Our tools are free and do not require registration.
- Local Storage: Some tools use your browser's localStorage to save preferences (such as theme settings). This data stays on your device and is never sent to our servers.
- No Cookies (First-Party): We do not set first-party cookies.
Third-Party Services
- Google AdSense: We use Google AdSense to display advertisements. Google may use cookies and web beacons to serve ads based on your prior visits. You can opt out of personalized advertising at Google Ads Settings.
- Cloudflare: Our site is hosted on Cloudflare Pages, which may collect standard web server logs (IP address, browser type, pages visited) for security and performance purposes. See Cloudflare's Privacy Policy.
Data Security
Since we don't collect personal data, there is minimal risk to your privacy. All tool inputs are processed locally in your browser and never leave your device.
Children's Privacy
Our website is not directed at children under 13. We do not knowingly collect personal information from children.
Changes to This Policy
We may update this privacy policy from time to time. Changes will be posted on this page with an updated date.
Contact Us
If you have questions about this privacy policy, please contact us at sungje5575@gmail.com.
Cookies and advertising in detail
We set no first-party cookies. The cookies you may see on this site come from Google’s advertising stack, which is a third party under this policy. Google and its partners use cookies and similar identifiers to serve ads based on prior visits to this or other websites, and to limit how often the same ad is shown.
You can turn personalised advertising off without leaving it to us. Google’s own controls are at adssettings.google.com; the industry opt-out pages for multiple vendors at once are aboutads.info/choices and youronlinechoices.eu. Turning personalisation off does not remove ads, it removes the targeting.
Analytics
We measure page views with Cloudflare Web Analytics, which is cookieless: it does not set an identifier, does not fingerprint the browser and does not build a profile across sites. What we see is aggregate — which pages were requested, the referring site, country and device class. We cannot tie any of it to an individual.
Our hosting provider also keeps standard server logs containing the request, the time, the user agent and a truncated IP address, for security and abuse handling. These are retained by the provider under their own schedule and are not used for advertising.
What stays on your device
Every calculator on this site runs in the browser. Values you type — a salary, a body weight, a pool depth — are processed on your device and are never sent to us. Some tools write a preference to localStorage (the light or dark theme, a last-used unit). Clearing site data in your browser removes all of it, and nothing about it reaches a server.
There are no accounts, no sign-in and no newsletter, so we hold no name, email address or password for visitors. If you email us, we hold that message in the mailbox it arrived in, and nothing more.
Your rights
Because we do not collect personal data ourselves, there is usually nothing for us to export or erase. Where a right applies to data a third party holds — Google’s advertising identifiers, for example — that request goes to them, and their privacy policy sets out how. If you are in the EEA or UK, the lawful basis for third-party advertising cookies is your consent, given through the consent dialogue, and you may withdraw it at any time through the controls above. If you are in California, we do not sell or share personal information as those terms are defined in the CCPA/CPRA.
Questions, corrections, or a request about anything on this page: sungje5575@gmail.com. We answer from the same address.