Help Center

1. Is my data uploaded anywhere?

No. Every tool computes inside your browser with JavaScript. What you type or paste is never sent to our servers — we can't see it, and we don't store it. Closing the page clears it from your device.

2. Are the tools free?

Yes — all tools are free to use, with no paywalls and no usage limits. Creating an account lets you bookmark favorite tools and sync them across devices.

3. Do I need to sign up?

No. Every tool works without an account. Sign-up is optional and only needed for account features like bookmark sync.

4. How much data can I process in bulk?

The limit depends on your device's performance and browser memory. Texts of tens of thousands of lines usually work fine; for very large datasets, process them in batches to keep the browser responsive.

5. Which languages are supported?

The interface supports Simplified Chinese, Traditional Chinese, English and Japanese — switch anytime from the footer or the language menu at the top right. Your choice is stored in a cookie.

6. Does it work on mobile?

Yes. The site is optimized for mobile browsers, so phones and tablets can use every tool. No app installation needed.

7. Can I trust the calculation results?

Tools use the browser's native high-precision numeric types and are reliable for everyday use. For serious scientific or financial work, please double-check critical results — and let us know if anything looks wrong.

8. Is there a public API?

Not yet. Everything runs directly on the page. If you have a use case that needs an API, we'd love to hear about it.

9. Can I request a new tool?

Absolutely. Send your request through the contact details in the footer and we'll evaluate and schedule it.

10. A tool won't open or shows an error

First try reloading the page or switching browsers (latest Chrome, Edge, Firefox or Safari recommended). If the problem persists, tell us the tool name and the steps to reproduce it.