PDF Tool

Annotate PDF

Add text, images, shapes, drawings, and highlights to your PDF pages.

Click to upload or drag and drop

PDF files only

What is Annotate PDF?

Annotate PDF adds highlights, notes, and annotations to PDF documents directly in your browser. See also: sign-pdf or pdf-header-footer.

How It Works

Upload or load your PDF into the tool, configure the settings as needed, and click the process button. The tool reads and modifies the PDF structure using client-side JavaScript libraries, then generates a downloadable output file. Your documents never leave your browser.

Use Cases

Professionals who need to modify PDF documents quickly without Adobe Acrobat
Students annotating or organizing research papers and study materials
Anyone who needs a fast, private way to edit PDF files on any device

Frequently Asked Questions

Is the Annotate PDF free?

Yes, the tool is 100% free with no file size limits or usage restrictions.

Are my PDF files uploaded to a server?

No, all processing happens in your browser using JavaScript. Files never leave your device.

What browsers are supported?

The tool works on all modern browsers including Chrome, Firefox, Safari, and Edge.

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