Privacy Policy

1. Summary

The site does not run accounts, contact forms, or any feature that asks you for personal data. The unit converters and calculators run entirely in your browser, so your inputs and results are never transmitted to a server controlled by FileSize.org.

The site does, however, use two third-party services from Google: Google Analytics for aggregate traffic measurement, and Google AdSense to display advertising. Both place cookies and process information about your visit, including your IP address. Details, vendor links, and opt-out paths are below.

2. Data we collect directly

FileSize.org has no login, no comments, no newsletter, and no contact form. The only direct interaction in which you provide information is when you choose to email the addresses listed on the contact page. In that case the message and the email address you sent it from are received and read, and kept only for as long as needed to respond and resolve the issue.

3. Server logs

Like virtually every web server, the host that serves these pages writes standard access logs. Each entry typically contains a timestamp, the URL requested, an HTTP status code, your IP address, your user-agent string (browser/OS), and the referring URL if one was sent. These logs are used for troubleshooting, abuse prevention, and aggregate traffic understanding, and are rotated/retained according to the host's defaults.

4. Google Analytics

FileSize.org uses Google Analytics 4 (measurement ID G-64V11WXW6S) to understand which pages people visit and how the site performs. Google Analytics sets cookies (typically _ga and _ga_*) and processes information including your IP address, device and browser characteristics, pages viewed, and approximate location derived from IP. Google acts as a data processor on behalf of FileSize.org for this purpose.

You can prevent Google Analytics from collecting data by installing the Google Analytics Opt-out Browser Add-on, by blocking the googletagmanager.com domain in your browser, or by enabling “Do Not Track” / “Global Privacy Control” in browsers that support it.

5. Google AdSense and advertising

FileSize.org displays advertising provided by Google AdSense. Google and its certified third-party advertising partners use cookies and similar identifiers to serve ads, measure ad performance, and — where you have provided the necessary consent or where applicable law permits — personalize ads based on your prior visits to this and other websites.

As required by Google's publisher policies:

• Third-party vendors, including Google, use cookies to serve ads based on prior visits to this site or other sites.
• Google's use of advertising cookies enables it and its partners to serve ads to users based on their visit to this site and/or other sites on the Internet.
• You can opt out of personalized advertising by visiting Google Ad Settings.
• You can opt out of a third-party vendor's use of cookies for personalized advertising by visiting aboutads.info or, in Europe, Your Online Choices.

Full details of how Google handles data when you use partner sites or apps are described in “How Google uses information from sites or apps that use our services”.

For visitors in the European Economic Area, the United Kingdom, and Switzerland, Google operates a Consent Management Platform on behalf of publishers; you may be presented with a consent prompt and your choice is recorded by Google.

6. Cookies and similar storage

The site itself does not set first-party cookies for tracking or personalization. The cookies you may encounter when visiting are set by the third-party services described above (Google Analytics, Google AdSense, and any of Google's certified ad partners that participate in a given ad auction).

For a categorized list of those cookies and instructions on how to control them in your browser, see the cookies page.

7. Hosted fonts and external assets

Pages on this site load typefaces from Google Fonts (fonts.googleapis.com, fonts.gstatic.com), and the homepage loads the Leaflet map library from cdnjs.cloudflare.com for its world-map section. When your browser fetches these files, the requesting IP address is visible to those CDNs as a normal part of how HTTP works. No identifiers are sent beyond what the browser sends in any standard request.

8. Children

This site is a general-audience reference and is not directed at children under the age of 13 (or the equivalent minimum age in your jurisdiction). It does not knowingly collect personal information from children.

9. Your rights — GDPR (EEA/UK), CCPA/CPRA (California), and similar laws

Depending on where you are, you may have the right to:

• Access the personal information that has been collected about you.
• Correct inaccurate information.
• Delete personal information.
• Object to or restrict certain processing, including profiling for advertising.
• Opt out of the “sale” or “sharing” of personal information for cross-context behavioral advertising (CCPA/CPRA terms).
• Withdraw consent at any time, where processing relies on consent.
• Lodge a complaint with your local supervisory authority.

Because FileSize.org itself does not maintain user accounts or a user-record database, most of these rights are exercised against the underlying processors (Google) using their own tools — Google Ad Settings, the Google Analytics opt-out, or your Google account's data and privacy controls. For anything involving correspondence you have sent to privacy@filesize.org, contact that address.

10. International transfers

Google's services process data on infrastructure located in multiple countries, including the United States. Where applicable, Google relies on its own legal mechanisms (such as the EU-US Data Privacy Framework and Standard Contractual Clauses) to provide an adequate level of protection for transfers out of the EEA, UK, and Switzerland.

11. Retention

Server logs are retained for a short period sufficient for security and operations. Google Analytics retention is configured to Google's default for GA4 (currently 14 months for event-level data). Email correspondence is kept only as long as needed to handle the matter raised, then deleted.

12. Changes to this policy

This policy may change to reflect updates to the services used by the site, applicable law, or how the site operates. Material changes will be reflected in the “Last reviewed” date at the top of this page. Continued use of the site after a change constitutes acceptance of the revised policy.

13. Contact

Privacy questions and requests can be sent to privacy@filesize.org. The publisher operates from [Jurisdiction], and applicable local data-protection law applies.