Privacy Policy

1. Overview

ConverterMaster ("ConverterMaster", "we", "our", or "us") is run by AS Electronic, Sri Lanka, and provides unit converters, calculators and file tools at convertermaster.net. We try to collect as little data as possible.

This Privacy Policy explains the nature of data gathered when you visit our website, how cookies are utilized for Google AdSense advertisement delivery, and your legal rights under the European Union General Data Protection Regulation (GDPR), the UK Data Protection Act, and the California Consumer Privacy Act (CCPA/CPRA).

2. Information We Collect

A. Information You Voluntarily Provide

We only collect personal information when you deliberately choose to transmit it to us. This includes:

• Contact Inquiries: When submitting an inquiry through our Contact interface or sending an email to [email protected], we receive your name, email address, and message contents.

B. Automatically Collected Technical Logs

Our hosting provider, Cloudflare, automatically processes standard request data when you load a page, including:

• Internet Protocol (IP) address
• Browser user-agent string and operating system version
• Referring/exit page URLs and timestamp of request
• HTTP response status code and data transfer size

This data is used to deliver the site, protect it against attacks and keep it running. We use the country Cloudflare reports to decide whether to show the consent banner; we do not store your IP address for that.

C. Our Own Visit Counter

The site has a simple first-party visit counter. For each page view it records the page path, the country reported by Cloudflare, the device type (mobile or desktop) and the referring site (for example Google or Direct). With your consent, or outside the EEA, UK and Switzerland, it also stores a random visitor ID in your browser (localStorage key cm_vid) so repeat visits are not counted twice. If you are in those regions and have not agreed to analytics, or if you reject analytics, no visitor ID is stored and the view is counted without one. These statistics are only used to see which tools are used and are not shared or sold. Our hosting provider, Cloudflare, also runs Cloudflare Web Analytics, a cookie-free service that reports aggregate page views and performance without tracking individual visitors across sites.

3. Google AdSense, DoubleClick & Third-Party Cookies

ConverterMaster is free to use. To pay for it, we show ads from third-party vendors, mainly Google AdSense.

Your Consent Choices (Cookies & Personalised Ads)

If you visit from the European Economic Area, the United Kingdom or Switzerland, a privacy banner on your first visit lets you accept all, reject all non-essential storage, or customise your choices. Until you choose, we treat analytics and ad personalisation as denied for those visitors (Google Consent Mode v2: ad_storage, ad_user_data, ad_personalization and analytics_storage are set to denied by default for those regions). Visitors elsewhere are not interrupted by the banner, but can open the same choices at any time from the footer. We work out your region from the country reported by our hosting network when the page loads; we do not store your IP address for this. If you decline personalised ads, Google AdSense only serves non-personalised ads, which are based on the content of the page and your general location rather than your browsing history. Your choice is saved on your device in localStorage (key cm_consent_v1) for up to 12 months. You can review or change it at any time with the Cookie settings link in the footer of every page, and you can withdraw consent as easily as you gave it.

Visitors in the European Economic Area, the United Kingdom and Switzerland are asked for consent before any personalised advertising or analytics cookies are used. California residents can opt out of the "sale" or "sharing" of personal information by choosing Reject non-essential or by using the Google Ads Settings link above.

Cookie Categories Used on ConverterMaster

You can control or disable cookies at any time through your browser preferences. Please note that disabling cookies does not impact your ability to calculate conversions on ConverterMaster.

4. LocalStorage & Offline Calculation Privacy

ConverterMaster utilizes the modern browser window.localStorage API rather than persistent server-side database records.

• Recently Used Conversions: When you compute a conversion, the input value and selected unit pair are saved in your device's localStorage under the key cm_recent_conversions_v2 so you can review recent history.
• Saved Favorites: Starred unit pairs and engineering formulas are saved locally under cm_saved_favorites_v2.
• UI Theme Mode: Your preference between Light and Dark mode is saved under convertermaster_theme.

5. European Union & UK GDPR Rights

If you reside in the European Economic Area (EEA), United Kingdom, or Switzerland, you possess distinct statutory rights under Regulation (EU) 2016/679 (General Data Protection Regulation):

1. Right of Access: You have the right to request confirmation regarding whether we process your personal data and obtain a copy thereof.
2. Right to Rectification: You may request corrections to any incomplete or inaccurate data we hold about you.
3. Right to Erasure ("Right to be Forgotten"): You may request the permanent deletion of your contact messages.
4. Right to Restrict Processing: You have the right to halt processing while a dispute regarding accuracy is investigated.
5. Right to Data Portability: You may request your data in a structured, commonly used, and machine-readable format.
6. Right to Object: You may object at any time to the processing of your personal data based on legitimate interests or direct marketing.

To exercise any of these rights, please email us at [email protected]. We respond to all verified requests within thirty (30) calendar days free of charge.

6. California Consumer Privacy Act (CCPA / CPRA) Notice

Under the California Consumer Privacy Act of 2018 (CCPA) and the California Privacy Rights Act of 2020 (CPRA), California residents are entitled to specific disclosures:

• We Do Not Sell Your Personal Information: ConverterMaster does not sell personal information for monetary consideration.
• We Do Not Share Sensitive Personal Information: We do not collect or process sensitive personal information (such as Social Security numbers, financial account credentials, precise geolocation, or racial/ethnic origin).
• Right to Know & Delete: You have the right to request that we disclose the categories of personal information we have collected and request the deletion of such information.
• Non-Discrimination: We will never discriminate against you for exercising your CCPA rights; all calculators and features remain fully accessible regardless of choices made.

7. Third-Party Services & External Links

Our website may contain links to external engineering references, standards organizations (such as NIST, IEEE, ISO, and BIPM), or affiliate tools. We have no control over and assume no responsibility for the content, privacy policies, or practices of any third-party websites or services. We encourage you to review the privacy policy of any site you visit.

8. Children's Privacy (COPPA Compliance)

ConverterMaster is a general-audience educational and engineering calculation tool. We do not knowingly collect or solicit personally identifiable information from children under the age of 13 (or under 16 in the European Union). If we become aware that we have inadvertently collected personal data from a child without parental consent, we will promptly delete that information from our records.

9. Changes to this Privacy Policy

We reserve the right to update or amend this Privacy Policy periodically to reflect technological advances, legal amendments, or changes in operational practices. When updates are published, the "Last Updated" date at the top of this document will be modified accordingly. Your continued use of the platform following the posting of changes constitutes acceptance of the revised policy.

10. Contact Us

If you have any questions, concerns, or requests regarding this Privacy Policy or our data protection practices, please contact us: