Privacy Policy
Last updated: 2026-09-02
1. Core Principles
555Tools respects your right to privacy. Our core commitment is: no personal data collection, no data uploads to servers, and all computation performed locally in your browser.
2. Local Data Processing
Data is processed locally. All computation is completed in your browser, and no user input data is sent to any server. Data processed by any tool you use — including images, circuit parameters, state machine definitions, and calculation formulas — is handled entirely within your browser and is never transmitted to any server.
3. Data We Do Not Collect
We do not collect your personal information, device information, or IP address. You do not need to register an account to use all tools. We do not collect usernames, email addresses, phone numbers, or any personally identifiable information.
4. Analytics and Cookies
We may use anonymous access analytics (such as Vercel Analytics) to improve our tools. Such analytics do not contain personally identifiable information. If we use cookies, they are only used to store anonymous analytics identifiers and do not track user behavior. You can disable cookies through your browser settings without affecting tool functionality.
5. Third-Party Services
Our website is hosted on the Vercel platform, which may process anonymous access data for infrastructure monitoring. We do not sell or share user data with third parties. We do not embed external advertisements, social media plugins, or tracking scripts.
6. Policy Changes
We reserve the right to modify this Privacy Policy at any time. The updated policy will be posted on this page with the last updated date indicated. Your continued use of the Platform indicates your agreement to be bound by the modified policy. Material changes will be notified at least 15 days in advance via a website announcement.
7. Contact Us
If you have any questions about this Privacy Policy, please contact us at lgsdz@sina.com.