Support Center

Yes, 100% free. There are no premium tiers, no subscriptions, no hidden fees, and no sign-up required. All tools on Oneyfy are and will remain completely free to use.

No account is needed. Simply visit any tool page and use it immediately. We don't collect email addresses or require registration of any kind.

Completely. All tools process your data locally in your browser using JavaScript. Nothing you enter — text, numbers, health data, passwords — is ever transmitted to our servers. Your data stays on your device.

Most issues can be resolved by refreshing the page. If a tool still doesn't work, try clearing your browser cache or using a different browser. If the problem persists, please contact us and we'll look into it.

Once a tool page is loaded, many tools will continue to work even if you lose internet connection, since they run purely in your browser. However, you need a connection to initially load the page.

Click the ☀️/🌙 toggle button in the top-right corner of any page. Your preference is saved automatically and will be remembered on your next visit.

Absolutely! We love hearing tool suggestions from our users. Visit our contact page and tell us what tool you'd like to see added.

Our health calculators (BMI, BMR, calories, body fat, etc.) use standard, widely-accepted formulas. However, they are for general reference only and should not replace advice from a qualified healthcare professional. See our Disclaimer for more.

Most tools have a "Copy" button next to the output. Click it to instantly copy the result to your clipboard. You can then paste it anywhere you need.

Currently Oneyfy is ad-free. We may introduce non-intrusive, privacy-respecting ads in the future to help cover hosting costs, but we will never use tracking pixels or sell user data.