隐私说明Privacy Notice
一句话总结In one sentence
你选择的文件不会离开你的设备；本站不建立账号、不收集个人资料，只在浏览器本地保存几项界面偏好。Files you choose never leave your device. There are no accounts, no personal profiles, and only a few interface preferences are kept in your browser.
文件如何处理How files are handled
图片压缩、PDF 合并、图片转 PDF 等工具通过浏览器 API 读取你选择的文件，在内存中处理后直接生成下载文件。整个过程没有上传请求，服务器也拿不到文件内容。Tools such as the image compressor, PDF merger and image-to-PDF converter read the files you pick through browser APIs, process them in memory and produce a download directly. No upload request is made, and the server never receives the file.
关闭标签页或刷新页面后，这些文件数据会随页面释放；本站不会保留副本。Closing the tab or reloading releases that data with the page; no copy is retained.
浏览器本地存储Local storage in your browser
为了记住界面状态，本站使用 localStorage 保存以下四项，均可随时清除：To remember interface state, the site keeps four items in localStorage, all of which you can clear at any time:
这是浏览器本地数据，不会同步到服务器，也不会用于画像或广告投放。This data stays in your browser, is not synced to a server, and is not used for profiling or ad targeting.
- upbox-theme：浅色 / 深色主题upbox-theme: light or dark theme
- upbox-lang：中文 / English 语言选择upbox-lang: Chinese or English
- upbox-favs：收藏的工具列表upbox-favs: favourited tools
- upbox-recent-used：最近实际使用过的工具upbox-recent-used: tools you actually used recently
访问日志与统计Access logs and analytics
本站不嵌入第三方统计脚本，也不读取广告标识符。托管服务商可能按行业惯例记录访问日志（如 IP、浏览器类型、访问时间），用于安全防护与故障排查。The site embeds no third-party analytics and reads no advertising identifiers. The hosting provider may keep standard access logs (IP, browser type, time) for security and troubleshooting.
如果你通过外部链接离开本站，目标站点有自己的隐私规则，本站无法控制。If you follow an external link away from this site, the destination has its own privacy rules that this site cannot control.
第三方资源与 CookieThird-party resources and cookies
图标与字体全部自托管，页面不引用第三方 CDN；除静态托管服务外，页面不会主动向其他域名发起请求。Icons and fonts are self-hosted and no external CDN is referenced; apart from the static host, the page makes no requests to other domains.
本站不使用跟踪 Cookie。清除浏览器站点数据即可移除上文的本地记录。The site sets no tracking cookies. Clearing site data in your browser removes the local records described above.
变更与说明Changes
若工具能力变化导致数据处理方式改变（例如新增需要联网的功能），会在此页更新说明与日期后生效。If a new capability changes how data is handled (for example a feature that needs the network), this page will be updated with a new date before it takes effect.
本页不构成法律意见；如你代表组织使用本站，请按自身合规要求评估。This page is not legal advice; organisations should assess it against their own compliance requirements.