隐私政策 Privacy Policy
This policy is provided in both Chinese and English. In case of any discrepancy, the Chinese version shall prevail.
一、引言 / Introduction
pdf.tpao.cn（下称"本网站"）由【运营主体名称】（下称"我们"）运营，向您提供在线 PDF 处理工具集（下称"本服务"）。本隐私政策说明您访问和使用本网站时，我们如何处理您的文件与相关信息。
我们深知文件与个人信息对您的重要性。我们承诺：您通过本服务处理的文件不会被上传至我们的服务器。请您在使用本服务前仔细阅读并理解本政策；您开始使用本服务，即表示您同意本政策的内容。
pdf.tpao.cn (the "Site") is operated by [Operator Name] ("we", "us") and provides a collection of online PDF tools (the "Service"). This Privacy Policy explains how we handle your files and related information when you access and use the Site.
We promise that files you process with the Service are never uploaded to our servers. By using the Service, you agree to this Policy.
二、核心承诺：文件仅在您的设备本地处理 / Core Commitment: Local Processing Only
- 本服务的全部功能（包括但不限于 PDF 压缩、合并、拆分、格式转换、加密与解密、OCR 识别、签名、加水印等）均基于前端技术在您的浏览器内本地完成。
- 您选择、拖入或粘贴的文件仅存在于您浏览器的内存中，不会被上传至我们的服务器或任何第三方服务器；处理完成后生成的结果文件同样由您的浏览器在本地生成，并由您自行下载保存。
- 当您关闭或刷新页面时，浏览器内存中的文件数据即被清除。
- 本服务无需注册、无需登录、不提供账户体系。我们不会收集您的姓名、电话号码、电子邮箱等个人身份信息。
- All features of the Service (including but not limited to compressing, merging, splitting, converting, encrypting/decrypting, OCR, signing and watermarking PDFs) run locally in your browser.
- Files you select, drop or paste exist only in your browser's memory and are never uploaded to our servers or any third-party server. Output files are generated locally and downloaded by you.
- When you close or refresh the page, file data in browser memory is discarded.
- The Service requires no registration, login or account. We do not collect personal identifiers such as your name, phone number or email address.
三、我们不会收集的信息 / Information We Do NOT Collect
我们不会收集、存储或接触：您的文件内容及处理结果；您的个人身份信息；您的通讯录、相册、精确位置等设备敏感信息。
We do not collect, store or access: the content of your files or processing results; personal identifiers; or sensitive device data such as contacts, photo libraries or precise location.
四、保存在您设备本地的信息 / Information Stored Locally on Your Device
为实现基本功能与个性化体验，本服务使用浏览器的本地存储（localStorage）保存少量数据。这些数据仅保存在您的浏览器中，不会上传至我们，也不用于识别您的身份：
| 存储项 / Key | 用途 / Purpose | 如何清除 / How to remove |
|---|---|---|
pdf_toolbox_lang | 记忆您选择的界面语言 Remembers your interface language | 清除浏览器站点数据 Clear site data in browser settings |
pdf_toolbox_theme | 记忆深色/浅色主题偏好 Remembers dark/light theme | 同上 / Same as above |
pdf_toolbox_usage | 记录最近使用的工具，便于快速访问 Recently used tools for quick access | 站内"清除记录"功能或清除站点数据 In-site "clear history" or clear site data |
pdf_toolbox_favs | 您收藏的工具列表 Your favorited tools | 取消收藏或清除站点数据 Unfavorite or clear site data |
pdf_toolbox_daily | 本地使用次数统计（仅用于页面展示） Local usage counter (display only) | 清除站点数据 Clear site data |
五、第三方服务与自动收集的信息 / Third-Party Services & Automatically Collected Information
为维持网站运行与改进服务，本网站涉及以下第三方服务，其可能处理有限的技术信息：
The Site relies on the following third-party services, which may process limited technical information:
1. 百度统计（Baidu Analytics）
我们使用百度统计了解网站的整体使用情况，例如访问量、页面浏览情况、大致地域分布、浏览器与设备类型等。百度统计可能使用 Cookie 并收集经匿名化、聚合处理的使用数据，该等数据无法识别特定个人。
We use Baidu Analytics to understand overall usage of the Site (visits, pages viewed, approximate region, browser and device types). Baidu Analytics may use cookies and collect anonymized, aggregated usage data that cannot identify any individual.
2. 广告展示 / Advertising
本网站可能通过页面广告位展示第三方广告（如 Google AdSense）。第三方广告服务商可能使用 Cookie，根据您此前对网站的访问情况向您展示个性化广告（例如 Google 的 DART Cookie）。您可以前往 Google 广告设置 或访问 www.aboutads.info 退出个性化广告。退出后，您仍可能看到广告，但广告与您的相关性会降低。
The Site may display third-party advertisements (e.g., Google AdSense) in designated ad slots. Third-party ad vendors may use cookies (such as Google's DART cookie) to serve personalized ads based on your prior visits. You may opt out of personalized advertising via Google Ads Settings or www.aboutads.info.
3. 内容分发网络（CDN）/ Content Delivery Networks
本服务的功能库（如 pdf.js、pdf-lib、Tesseract.js 等）与字体文件从公共 CDN（cdnjs.cloudflare.com、cdn.jsdelivr.net）动态加载。当您的浏览器请求上述资源时，相应 CDN 服务商会依照互联网通行机制获得您的 IP 地址、浏览器类型等常规网络日志信息。该等信息是互联网访问所必需的技术信息，CDN 服务商通常仅将其用于资源分发、缓存与安全目的。
The Service loads open-source libraries (e.g., pdf.js, pdf-lib, Tesseract.js) and font files from public CDNs (cdnjs.cloudflare.com, cdn.jsdelivr.net). When your browser requests these resources, the CDN providers receive routine network log information such as your IP address and browser type, which they use for content delivery, caching and security.
4. "URL 转 PDF"功能 / URL-to-PDF Feature
使用该功能时，系由您的浏览器直接访问并抓取您所输入的网页地址，网页内容仅在您的浏览器中获取与处理，我们无法查看或存储该网址及内容。请您在使用该功能时遵守目标网站的条款，并注意目标网站的隐私政策。
When you use the URL-to-PDF feature, your browser directly fetches the URL you enter; the content is obtained and processed solely in your browser. We cannot view or store the URL or its content. Please respect the terms and privacy policy of the target website.
5. OCR 识别与字体下载 / OCR Models & Font Downloads
OCR 识别所需的语言模型及中日韩字体在使用相应功能时从 CDN 临时下载，仅用于在您的浏览器本地完成识别与渲染。
Language models for OCR and CJK fonts are downloaded on demand from CDNs and are used solely for local recognition and rendering in your browser.
六、Cookie 及本地存储的控制 / Cookies & Local Storage Control
除上述第三方服务可能设置的 Cookie 外，本网站自身不使用 Cookie 追踪您的身份，本站偏好设置均通过 localStorage 实现。您可以通过浏览器设置随时查看、删除 Cookie 或清除本站点的 localStorage 数据；具体操作请参阅您所用浏览器的帮助文档。请注意，清除相关数据后，您的语言、主题等偏好设置将被重置。
Except for cookies set by the third-party services above, the Site itself does not use cookies to track your identity; preferences are stored via localStorage. You can view, delete cookies or clear this Site's localStorage data at any time through your browser settings. Doing so will reset your language and theme preferences.
七、跨境传输说明 / Cross-Border Transfer
本网站自身不在境外存储您的文件或个人信息。当您加载 CDN 资源时，IP 地址等技术信息可能传输至境外 CDN 服务商。该等传输仅限于互联网资源加载所必需的最小范围。
We do not store your files or personal information outside of China ourselves. When CDN resources are loaded, technical information such as your IP address may be transmitted to CDN providers located abroad, strictly to the extent necessary for resource delivery.
八、未成年人保护 / Protection of Minors
本服务面向一般公众，不面向未满 14 周岁的儿童。若您是未满 14 周岁的未成年人，请在监护人的陪同与指导下阅读本政策，并在征得监护人同意后使用本服务。我们不会故意收集儿童的个人信息。
The Service is intended for general audiences and is not directed at children under 14. If you are under 14, please read this Policy with and obtain consent from your guardian. We do not knowingly collect personal information from children.
九、安全 / Security
本网站通过 HTTPS 加密传输页面资源；文件本地处理机制从根本上避免了文件在网络传输与服务器存储环节的风险。但请您理解，您设备与浏览器自身的安全状况（如是否感染恶意软件）亦会影响数据安全，建议您妥善保管自己的设备与文件，并在处理敏感文件前做好备份。
The Site is served over HTTPS, and local processing fundamentally eliminates the risks of file transmission and server storage. Please note that the security of your own device and browser also matters; keep your device safe and back up important files before processing them.
十、政策的更新 / Changes to This Policy
我们可能适时修订本政策。更新后的政策将在本页面公布并更新"更新日期"。若修订内容重大，我们将以显著方式提示。您在本政策更新后继续使用本服务，即表示同意受更新后的政策约束。
We may update this Policy from time to time. Updated versions will be posted on this page with a revised "Last updated" date. Your continued use of the Service after an update constitutes acceptance of the revised Policy.
十一、联系我们 / Contact Us
如您对本政策或个人信息保护有任何疑问、意见或请求（如查阅、更正、删除），可通过以下方式与我们联系：
- 运营主体 / Operator：【运营主体名称】
- 联系邮箱 / Email：【联系邮箱】
- 通讯地址 / Postal address：【通讯地址】
我们将在收到您的请求并核实身份后，于法定期限内予以答复。
If you have any questions, comments or requests (e.g., access, correction or deletion) regarding this Policy or the protection of your personal information, please contact us:
- Operator: [Operator Name]
- Email: [Contact Email]
- Postal address: [Postal Address]
We will respond within the statutory time limit after receiving your request and verifying your identity.