Draw your signature with a mouse or touchscreen, add text fields for name, ID number or date, drag and resize them anywhere on the page, then export. Signatures are saved in your browser only — never uploaded.用鼠标或触摸屏手写签名，添加姓名、证件号、日期等文本字段，拖拽缩放到页面任意位置，然后导出。签名只保存在你的浏览器里——从不上传。
No. Everything is processed locally in your browser — the file never leaves your device.
不需要。所有处理都在你的浏览器中本地完成——文件永远不会离开你的设备。
No artificial limits. Very large files depend on your device memory; a modern laptop handles hundreds of MB without trouble.
没有任何人为限制。超大文件取决于你设备的内存；现代笔记本处理几百 MB 毫无压力。
Nothing. All tools are free, with no sign-up and no watermark.
完全免费。所有工具都不收费，无需注册，也不加水印。
Any recent version of Chrome, Edge, Firefox or Safari with JavaScript enabled.
任何较新版本的 Chrome、Edge、Firefox 或 Safari，启用 JavaScript 即可。
Combine any number of PDF files into one document in seconds. Everythi…把任意数量的 PDF 文件在几秒内合并成一个文档。全部处理都在你的浏览器中完成——文件永远不会离开你的设备。…
Extract specific pages or split a large PDF into several smaller files…提取指定页面，或把一份大 PDF 拆成多个小文件。免费、快速、私密。…
Shrink a large PDF by re-rendering each page as optimized JPEG. Works …通过把每页重新渲染为优化后的 JPEG 来减小 PDF 体积。对扫描件和图片密集的文件效果最好。…
Turn every page of a PDF into a high-quality JPG or PNG image. Pick st…把 PDF 的每一页转换成高质量 JPG 或 PNG 图片。可选标准、高或超高分辨率。…
Turn photos, scans and screenshots into a single PDF. Keeps original q…把照片、扫描件和截图变成一个 PDF。保持原始画质，无需上传。…
Fix sideways or upside-down pages. Rotate every page, or only odd/even…修正侧倒或颠倒的页面。可以旋转全部页面，或只旋转奇数/偶数页。…