Privacy policy

1. In one sentence

Every tool on this site computes inside your browser. Files you select and ID numbers you type are never uploaded, stored or forwarded. The only data that leaves your device is the ordinary network information carried by page analytics and ad requests (page address, browser type, referrer and similar).

2. What we do not collect

• File contents: PDFs and images are read through the browser's File API and processed only in local memory and a Web Worker; the result becomes a download through a Blob URL. There is no upload endpoint anywhere in that path.
• ID numbers: parsing is plain client-side computation. The value exists only in a memory variable on the current page and disappears when you refresh or close it. Nothing is persisted and nothing is written to localStorage.
• Account details: there is no sign-up or login, and we do not collect phone numbers, email addresses or names.

3. What we store locally

To save you retyping things, browser local storage keeps a few preferences. They expire after 30 days, live only on your device, and are never uploaded:

• last_target_size / last_target_unit: the target size and unit you used last.
• consent_ads: your choice about advertising cookies. Choosing "Don't load ads" is remembered too — we will not keep asking.
• toolsite.locale: your language choice, so the site keeps showing the edition you picked instead of switching back based on your browser language.

You can clear all of it through your browser settings at any time; the tools keep working.

4. Third-party services and cookies

The site may load the following third-party services. They use cookies or similar technologies when a page loads or an ad is served:

• Google AdSense (advertising): serves ads and bills per impression or click. The ad script may read page context and set cookies. You can choose "Don't load ads" on the ad slot itself, in which case the ad script is not loaded at all.
• Baidu Analytics (traffic statistics): aggregated page views, referrers and time on page. It does not read files or input on the page.
• Affiliate links: once you follow one, the destination site handles your data under its own privacy policy and may record the referral for commission purposes.

These scripts can only see page-level information. We keep no sensitive data from you on the page — an ID number is never written into a DOM attribute, never cached, and never displayed in full in the results area, so a third-party script cannot simply read it off the page.

5. Security measures on this site

• HTTPS everywhere, plus a Content Security Policy that limits connect-src to the same origin, blocking outbound transmission of file data at the policy level;
• ID parsing results are masked by default (for example 622***********8498); full numbers do not stay on screen;
• All user text is written into the page through textContent rather than concatenated HTML, which prevents XSS;
• Compression output is created with URL.createObjectURL and released afterwards, reducing what can linger in browser caches.

6. Your rights

Because we do not collect or store your personal information in the first place, exercising rights of access, correction or deletion usually means no more than clearing your browser's local data. If you believe a part of this site still processes your personal information, tell us and we will look into it once we have verified the details.

7. Minors

This site does not offer services aimed at minors and does not knowingly collect information from them. Please do not type another person's ID number on a shared or public device.

8. Changes to this policy

If this policy changes materially we will update the date at the top of this page. Continuing to use the site means you are aware of the updated version.

9. Contact us

For privacy questions, email manqiong_com@163.com or use the contact page. This page is a translation provided for readers of the English edition; if the Chinese and English versions ever differ, the Chinese version governs.