常见问题
关于使用 PDF Sign Pad 签署 PDF 的常见问题解答。
使用方法
加载您的 PDF
将 PDF 拖放到浏览器窗口中，或选择一个文件——不会上传任何内容。
添加您的签名
绘制、输入、上传，或重复使用已保存的签名。
放置到页面上
在任意页面的任意位置拖动、缩放或旋转您的签名（或添加文字）。
下载已签署的 PDF
下载您完成的、已展平的 PDF——依然只保存在您的设备上。
我的文档会被上传到某处吗？
不会。您的 PDF 和签名完全在您的设备上处理，绝不会离开您的浏览器。
这是具有法律约束力的签名吗？
PDF Sign Pad 创建的是简单的可视电子签名。它不是经认证或合格的数字签名——请参阅我们的免责声明。
它支持我的语言吗，包括阿拉伯语？
支持。界面提供 7 种语言，包括从右到左书写的阿拉伯语。
我保存的签名会发生什么？
如果您启用"保存到此浏览器以便重复使用"，您的签名将只存储在您自己的浏览器中——绝不会存储在我们的服务器上——以便您下次重复使用。此功能默认关闭，您可以随时在"已保存"标签页中删除它。
我可以使用哪些文件类型作为签名？
您可以用鼠标或手指绘制、以签名字体输入您的姓名，或上传 PNG、JPG、WebP 或 SVG 图片。带透明背景的 PNG 通常效果最佳。
文件大小有限制吗？
有——最大 25 MB 的 PDF 可直接在浏览器中打开。由于所有处理都在您自己的设备上进行而非服务器，因此不支持更大的文件。
关闭标签页后，我的文档会怎样？
不会保留任何内容。您的文档、添加的任何文字以及签名仅存在于该会话期间浏览器的内存中——关闭标签页、刷新页面或点击"重新开始"都会将其完全释放。
以下部分答案仅提供英文版本——界面的其余部分支持全部 7 种语言。
Can I use PDF Sign Pad to sign a lease, an NDA, a job offer, or a school consent form?
For everyday, self-sign documents like these, a simple electronic signature is usually accepted: draw, type, or upload your mark, place it on the page, and download a finished, signed PDF. It's not built for documents that legally require notarization, witnessing, or a wet-ink signature — wills and certain court filings, for example, usually need something more than a simple electronic signature. This isn't legal advice — see our for what a simple electronic signature is and isn't, and talk to a licensed attorney if you're unsure about your specific document.
Can I sign a PDF online for free — without creating an account?
Yes. PDF Sign Pad is free to use, with no account, no sign-up, and no email address required — not even to save a signature for later. Open the tool, drop in your PDF, sign it with a drawn, typed, uploaded, or saved signature, and download the finished file. Nothing about your document is uploaded anywhere in the process — everything happens in your browser. See the for exactly how it works.
Can I sign a PDF on my phone?
Yes. PDF Sign Pad works in any modern mobile browser — open your PDF, then draw your signature with your finger, type it in a signature font, or upload an image, exactly as you would on a laptop. Placing, resizing, and rotating your signature or text works with touch the same way it works with a mouse. There's no app to install, and the same on-device privacy applies: your document never leaves your phone. See the for the step-by-step.
If I save my signature, can I use it on a different device or browser?
No. A saved signature is stored only in that one browser's local storage — never on a server, and never anywhere we could sync it for you. Switch to a different browser, a different device, or clear your browser's site data, and you'll need to save it again from scratch. It's a deliberate privacy tradeoff: keeping your saved signature off any server is what keeps it private, even though it means it won't follow you from browser to browser. See our for the full detail.
Does signing create a new PDF, or change my original file?
Signing never touches your original file. PDF Sign Pad only ever works with the copy loaded into your browser's memory — the file already saved on your device or in the cloud is untouched unless you choose to overwrite it yourself. When you click Download, the app "flattens" your signature and any text you've added — permanently baking your marks into the pages — and gives you a brand-new, finished PDF to save wherever you like. See the for more on how this works.
What if my PDF is bigger than 25 MB?
PDFs over 25 MB aren't supported today. Because everything runs on your own device rather than a server, there's no server-side trick to lift that ceiling — the limit exists to keep the app fast and reliable in a browser tab. If your file is larger, a quick fix is to shrink it first: our sibling tool, pdf-combiner.com's Compress tool, reduces a PDF's file size (also entirely in your browser) so you can bring it back under 25 MB and sign it here.
My PDF won't open, or my signature isn't showing up — what should I do?
Two different issues, two different fixes. If your PDF won't open at all, it's usually damaged or password-protected — PDF Sign Pad shows a plain error message and doesn't attempt to unlock protected files, so try removing the password first or opening a different copy of the file. If your signature isn't showing up, check that you actually clicked "Add signature" (or "Add text") after drawing, typing, or uploading it, and that you're looking at the page you placed it on — signatures and text are added per page, one at a time. See the if you want a step-by-step refresher.