Privacy Policy
Last updated: 2026-09-10
This Privacy Policy explains what happens to your data when you use 4Dev.net (the "Website"). We've tried to write it to match exactly what the Website's code actually does, not generic boilerplate.
1. Data You Submit to a Tool
When you use a converter or tool (for example, pasting JSON to convert, or entering a currency amount), that data is sent to our server only to perform the requested operation, and is not written to a database, log file, or any other persistent storage. It is discarded once the response is sent back to your browser. We do not read, retain, sell, or share the content you process through the Website's tools.
2. No Accounts or User Profiles
The Website does not offer account registration and does not build user profiles.
3. Cookies
4Dev.net sets one cookie of its own, named lang, storing which language you're shown. See the Cookie Policy for exactly how it's set (by your own choice, or automatically based on your country) and how to control it.
4. Server Logs and IP-Based Language Detection
Like virtually any website, the underlying hosting infrastructure may generate short-lived technical logs (such as IP address, requested URL, and timestamp) for operational purposes like debugging and abuse prevention. These are standard web server operations, not a feature built into the Website's own code, and are not used to build profiles of individual visitors.
Separately, on your first visit (before the lang cookie above is set), the Website uses a coarse, country-level signal derived from your IP address - provided directly by our hosting network, not stored or logged by the Website's own code - to guess which of its supported languages to show you. Only the resulting language choice is kept (in the cookie); your IP address or country itself is not retained anywhere by the Website.
5. Third-Party Requests
Certain tools call third-party services to function - for example, live currency/crypto rate providers, or a CDN serving a JavaScript library your browser needs. See the Third-Party Services and Advertising Disclosure page for the full list.
4Dev.net's own code does not store your data or keep logs of what you submit - that commitment covers everything we build. It does not extend to the third-party services and APIs some tools call, or to off-the-shelf libraries and components embedded in the Website: those operate under their own providers' data practices, which we don't control and can't guarantee. If a specific third party's own privacy practices matter to you, check that provider's own policy directly.
6. Children's Privacy
The Website is not directed at children and does not knowingly collect personal information from children.
7. Changes to This Policy
If the Website's data practices change - for example, if analytics or advertising is introduced - this Policy will be updated accordingly, and the "Last updated" date will reflect that.
8. Contact
Questions about this Policy can be sent via the Contact and Error Reporting page.