Annotate PDF Free Online

Draw freely on any PDF page. Use the pen tool, add shapes, or type text annotations anywhere. Full undo support. Everything stays in your browser.

Pen & Freehand Draw

Shapes: Rect, Circle, Arrow

Click-to-Type Text

Undo Support (Ctrl+Z)

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Upload a file to get started

How to Use Annotate PDF Online Free

Follow these simple steps to get your result in under a minute — everything runs in your browser, no account required.

Upload Your File

Drag your files into the upload zone. FreePDFTools previews the content immediately.

Configure Options

Use the sidebar controls to set your preferences for this tool.

Click Process

Hit the process button. Everything runs instantly in your browser — no upload, no server wait.

Download Result

Click Download to save your processed file directly to your device.

Here are the most popular reasons people use this tool every day:

📄 Document WorkflowIntegrate this tool into your regular document processing workflow for faster results.

🏢 Business UseUsed by professionals to handle PDF tasks without expensive desktop software.

📚 EducationStudents and teachers use FreePDFTools for quick, free PDF processing.

🏠 Personal UseHandle personal documents, invoices, and records without any software installation.

📱 Mobile FriendlyWorks on iPhone and Android — access from any device with a browser.

🔒 Privacy FirstAll processing stays in your browser — ideal for sensitive or confidential files.

Is this tool really free?▾

Yes. FreePDFTools is completely free with no file size limits, no watermarks on output, and no signup required.

Are my files private?▾

Completely. Your files never leave your device — all processing happens in your browser using JavaScript.

Does it work on mobile?▾

Yes. FreePDFTools works in Safari on iOS and Chrome on Android. All tools are mobile-responsive.

Is there a file size limit?▾

No hard limit. Practical limits depend on your device RAM. Files up to several hundred MB work fine on modern devices.

Which browsers are supported?▾

Chrome, Firefox, Safari, and Edge are all fully supported. Chrome gives the best performance.

Can I use it offline?▾

FreePDFTools requires an internet connection to load. Once loaded, processing works without further internet access.