在线免费PDF注释工具

Yes, the PDF注释工具 on Allio Tools is completely free with no sign-up or registration required. It works directly in your browser.

在PDF页面上添加文字、签名、形状和图片，即时下载已注释的PDF。 No data is sent to a server — everything runs locally in your browser for maximum privacy and speed.

No installation needed. The PDF注释工具 runs entirely in your web browser on any device — desktop, tablet, or mobile.

Completely safe. The PDF注释工具 processes everything locally in your browser. No input data, results, or usage information is ever transmitted to or stored on any server.

After the page loads for the first time, the PDF注释工具 works without an internet connection for all client-side processing. Tools that fetch live external data (such as DNS or network lookups) require an active connection.

Yes. The PDF注释工具 is fully responsive and works on all modern smartphones and tablets. No app download is required — open your mobile browser, navigate to the tool, and use it exactly as you would on a desktop.

Copy the result text or take a screenshot to share via message, email, or social media. The tool URL can also be bookmarked and shared directly — the PDF注释工具 works for anyone with a modern browser, no account required.

Yes. The PDF注释工具 is built with standard browser APIs and works on all modern browsers including Chrome, Firefox, Safari, and Edge — on both desktop and mobile. No plugins, extensions, or third-party software are required.

Select and copy the result text to paste into any document or app. For image tools, a Download button saves the file directly to your device. Your browser's built-in screenshot function also captures results quickly. No account or login is required.