Privacy Policy

Effective date: September 27, 2026 · Last updated: September 27, 2026

Dogu Sangja (https://tools.sotaneum.com, “this site”) is a collection of tools that run in your browser. This policy explains what information is processed when you use this site, and where. “We” and “us” mean the operator of this site. Under the GDPR, we’re the controller for the processing we’re responsible for on this site, such as deciding which services the site uses and handling emails sent to our contact address. For ads served through Google AdSense, whether personalized or not, Google processes data as an independent controller under its own policies. Cloudflare processes the data described under “Hosting” (page delivery and Web Analytics) on our behalf, as our processor. For some security and network-protection purposes, Cloudflare may itself act as a controller. Cloudflare’s Privacy Policy, linked in that section, explains how it handles data. The operator’s name and contact details are in the “Contact” section below.

What you enter into tools

Every tool on this site runs inside your browser. The text, numbers and files you enter are processed on your device only and are never sent to our server or any other server.

This is a static site: it only serves files that were built in advance, and there’s no server-side program that receives what you enter into tools. Some tools download extra code (libraries) from this site when they need it, but your input isn’t sent along with that request.

Information stored in your browser

For convenience, some information is saved in your browser’s local storage (localStorage). It stays on your device and is never sent to us.

• Recently used tools: the IDs of up to 6 tools you opened recently, used to show them under “Recently used” on the home page.
• Random Picker: the list you entered, so it’s still there next time you visit.
• Reaction Time Test: your single best time on this device.

You can remove the Random Picker list with the tool’s “Clear list” button, and the Reaction Time Test best time with the “Clear best time” button on its results screen. Clearing this site’s data (cookies and site data) in your browser settings deletes all of the above.

Advertising (Google AdSense)

This site shows ads from Google AdSense. Tool pages whose address contains /lab/ don’t show ads.

Google and its partners may use cookies or similar identifiers to serve ads and measure how they perform. This includes personalized ads based on your previous visits to this site and other websites. Google collects this information directly from your browser. We receive only aggregated reports, such as ad impressions and earnings, and no information that identifies you.

To learn how Google uses this information, see How Google uses information from sites or apps that use our services.

• You can turn off personalized ads in My Ad Center.
• To opt out of personalized-ad cookies from ad companies other than Google, visit aboutads.info (US) or youronlinechoices.eu (Europe).

If you visit from the European Economic Area (EEA), the UK or Switzerland, a consent message from Google asks whether you agree to the use of cookies and personal data for ads. You can change your choice later using the settings link provided with the consent message.

You can also block or delete cookies in your browser settings.

Hosting (Cloudflare)

This site is delivered through Cloudflare (Cloudflare Workers Static Assets). To deliver pages and protect the site from attacks, Cloudflare processes technical information such as your IP address and browser details (user agent) when you request a page. For details, see Cloudflare’s Privacy Policy.

We use Cloudflare Web Analytics to understand how much traffic the site gets and how quickly pages load. Cloudflare automatically adds a measurement script to the pages, which records information such as page views, the referring page (referrer), browser, operating system, device type and country. We see only aggregated statistics. According to Cloudflare, Web Analytics doesn’t use cookies or local storage and doesn’t fingerprint or track individual visitors. For details, see Cloudflare Web Analytics.

What we don’t do

• There are no sign-ups or user accounts.
• We don’t collect names, email addresses, phone numbers or similar information through this site, unless you choose to email us.
• We don’t sell personal information.

Legal bases, retention and international transfers

Where the EU General Data Protection Regulation (GDPR) applies, we rely on the legal bases below. In the UK, the UK GDPR applies instead, and in Switzerland, the Swiss Federal Act on Data Protection (FADP).

• Personalized ads and ad cookies: your consent (GDPR Art. 6(1)(a)). In the EEA, the UK and Switzerland, consent is requested through Google’s consent message described in the “Advertising” section, and you can change your choice later. Under the EU ePrivacy Directive and the national laws implementing it (for example § 25 TDDDG in Germany), storing or accessing information on your device for advertising requires your consent, which is collected through that same message.
• Cloudflare’s page delivery and security, and Cloudflare Web Analytics: our legitimate interests in operating, securing and improving this site (GDPR Art. 6(1)(f)).
• Emails you send us: our legitimate interest in answering inquiries (GDPR Art. 6(1)(f)).
• Information stored in your browser: your recently used tools, Random Picker list and Reaction Time Test best time are stored only on your device, to provide the features you use. They’re never sent to us, and you can delete them at any time, as described under “Information stored in your browser” above.

If you email us, we use your email address and message only to reply to you, and we delete them once they’re no longer needed to handle your inquiry. Apart from emails you send us, we don’t keep any personal information ourselves. Information stored in your browser stays on your device until you delete it. Google and Cloudflare keep information according to their own privacy policies.

Google and Cloudflare may process information in the United States and other countries. Both state that they participate in the EU-U.S. Data Privacy Framework and also rely on Standard Contractual Clauses (SCCs) where needed. They also state that transfers from the UK and Switzerland are covered by the UK Extension to the EU-U.S. Data Privacy Framework and the Swiss-U.S. Data Privacy Framework, respectively. Google says so on its data transfer frameworks page, and Cloudflare in its Privacy Policy linked above.

Your rights

Depending on where you live, laws such as the EU General Data Protection Regulation (GDPR), Korea’s Personal Information Protection Act (PIPA) or Japan’s Act on the Protection of Personal Information (APPI) may give you the right to access, correct or delete your personal information, or to ask us to stop processing it.

If you’ve emailed us, you can request access to or deletion of those emails by writing to the address in the “Contact” section below. We don’t keep any personal information about how you use the tools. You can delete the information stored in your browser yourself, as described under “Information stored in your browser” above. Ad-related information is processed by Google, so please use the Google resources and settings linked in the “Advertising” section. For any other questions, contact us. You can also file a complaint with the data protection authority in your country.

Changes to this policy

If this policy changes, we’ll update this page and the “Last updated” date above.

Contact

Operator and data controller: LEE DONGGUN (Republic of Korea)

For questions about this policy or your personal data, email: contact@sotaneum.com