Is the Annotate PDF tool completely free?

Yes, the Annotate PDF tool is 100% free to use. There are no hidden fees, no watermarks on the free tier, and you don't need to register an account to process your files.

Are my files safe when using Annotate PDF?

Absolutely. All processing for the Annotate PDF tool happens directly inside your web browser. Your files are never uploaded to our servers, meaning nobody else can ever see or access your sensitive data.

How exactly does Annotate PDF work?

Draw freehand on your PDF to highlight or annotate. Our tool uses advanced WebAssembly technology to perform these complex operations directly on your device CPU and RAM, which makes it incredibly fast and completely secure.

Does this work on mobile devices?

Yes! Our tools are fully responsive and work on iOS and Android devices directly in Safari or Chrome, without needing to download a separate app.

PDF Annotator

Free

Draw directly on the first page of your PDF and export the result. Runs 100% locally in your browser.

Drop a PDF file here or click to browse

or click to browse · max 50MB

billu's ready when you are

How to use Annotate PDF

Upload File

Drag and drop your file into the secure dropzone above, or click to select a file from your device storage.

Configure

Select your desired options or configure the settings. We provide an intuitive interface for maximum control.

Process

Click the action button. The processing happens instantly in your browser without uploading to any server.

Download

Save the final processed file securely to your device. It's ready to use instantly!

No Uploads

Files never leave your device.

100% Secure

Everything runs locally via WebAssembly.

Instant Download

Process and download in seconds.

Frequently Asked Questions

More PDF Tools

Merge PDF

Combine multiple PDF files into one document instantly.

Protect PDF

Add a password to PDF.

Unlock PDF

Remove password from PDF.

Compress PDF

Reduce PDF file size while keeping text and images sharp.