Privacy Policy

At a glance

• ECECH has no visitor accounts or sign-in, and its tools do not intentionally submit your entries to an ECECH account or calculation service.
• Many tools process values and files in your browser. Check each tool’s own instructions for its specific behavior.
• The site uses Google Analytics for site measurement and Google AdSense for advertising. Those Google services may use cookies and similar technologies.
• ECECH uses browser storage for preferences and saved or recently used tools; that information stays in the browser on your device.

Last updated: October 28, 2026

Tools, text, and files

ECECH does not require an account, and the tool pages do not intentionally send the values or files you enter to an ECECH calculation server. Many tools run their processing in your browser. A tool may load code or other resources from a third party, and site analytics and advertising scripts make separate requests; those requests are described below.

Processing can vary by tool. Follow the on-page explanation, especially before using a tool with confidential or sensitive information. ECECH does not provide a secure document-storage service.

Information stored in your browser

ECECH stores a light or dark theme preference and the list of tools you recently used or saved in your browser’s local storage. This supports site features across visits on the same browser. It is not an ECECH account and is not sent to an ECECH server. Some tools may also keep temporary working state in the open page so you can use their controls.

You can remove this information by clearing site data for ecech.com in your browser. If you block site storage, theme, recent-tool, or save features may not be retained.

Google Analytics

ECECH uses Google Analytics 4 to understand visits and improve the site. Its standard measurement may include page views, session statistics, browser and device details, and approximate location. Google Analytics can use a first-party _ga cookie to distinguish browsers and sessions. ECECH does not configure analytics to send the text, files, or results entered into a tool.

Google processes measurement data under its own terms and privacy practices. Learn about Google Analytics data collection and Google’s Privacy Policy.

Google AdSense and advertising cookies

ECECH uses Google AdSense to serve and measure ads. Google and other advertising partners may place or read cookies, use web beacons, and process information such as IP addresses or other identifiers as a result of ad serving. Depending on your location and settings, advertising may be personalized using visits to this or other sites, or may be non-personalized.

You can review or change Google’s personalization settings at Google Ads Settings. You can also visit aboutads.info choices. For more detail, read how AdSense uses cookies and how Google uses data on partner sites.

Hosting, delivery, and external sites

Cloudflare provides website hosting, delivery, and network security. To respond to a visit and help protect the site, Cloudflare may process request metadata such as an IP address, requested URL, browser or device details, and referral information. See Cloudflare’s Privacy Policy.

Some pages link to third-party sites, including Google and YouTube. When you follow those links, the destination’s privacy policy and settings apply.

Your controls

• Use your browser’s site-data controls to remove local preferences and recently used or saved tool lists.
• Use browser privacy settings or extensions to restrict cookies, analytics, or ads. Blocking them may change how ads or some site features work.
• Use Google Ads Settings or aboutads.info to manage personalized advertising choices. Google also offers an Analytics opt-out browser add-on.

Because ECECH has no visitor account or contact form, it does not maintain a user profile for you to retrieve or delete. Browser-only data can be cleared from your device, and requests about data held by Google or Cloudflare should be directed to those providers.

Changes to this policy

This page may be updated when the site’s features or service providers change. The date at the top of the policy shows when it was last revised.