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PDF Annotator

Annotate and enhance your PDF documents online. Add text, drawings, highlights, shapes, signatures, and watermarks, or organize PDF pages. 100% free, secure, and browser-based. Your files are processed locally in your browser and never uploaded to our servers.

Drag & drop your PDF or click to upload

PDF files only • Max 50MB

100% private • Processed in your browser

Discover More

Tips, guides & FAQs

Freehand DrawingText & ShapesPage Management100% Private

What Is a PDF Annotator?

A PDF annotator is a tool for adding notes, markings, and other elements to PDF documents. Add drawings, text, shapes, highlights, watermarks, and signatures. You can also reorder, delete, rotate, and duplicate PDF pages. All processing is done locally in your browser, so your files are never uploaded to our servers.

For more advanced PDF tasks, you can also try our Merge PDF, Split PDF, Compress PDF.

Freehand Drawing

Draw, sketch, or highlight directly on any page with customizable colors and stroke widths.

Text & Shapes

Add text boxes, rectangles, circles, lines, arrows, stars, and triangles with full formatting options.

Page Management

Reorder, delete, rotate, and duplicate pages – bulk select and act on multiple pages at once.

Watermarks & Signatures

Add text or image watermarks, and draw, type, or upload signatures with drag‑and‑drop placement.

How to Use

Follow these simple steps to get started.

1

Upload Your PDF

Drag and drop or select a PDF file from your device.

2

Annotate & Organize

Use the toolbar to draw, add text, shapes, highlights, or manage pages (reorder, delete, rotate).

3

Export & Share

Download your annotated PDF with all changes flattened into a single file.

Why Use This Tool?

Our PDF editor is free, private, and runs entirely in your browser – no sign‑ups required.

Real‑time Preview

Every annotation updates instantly – you see exactly what you get.

Full Page Control

Reorder, delete, rotate, duplicate pages – all with bulk selection.

Privacy First

Your PDF never leaves your browser – 100% client‑side processing.

Customizable Styling

Change colors, stroke widths, fonts, and highlight opacity to suit your needs.

Is This Tool Safe?

100% SECUREAll processing is done locally in your browser. Your PDF and annotations never leave your device.

Your file never leaves your device
No data transmitted over internet
No logs or data storage
Works offline after first load

Common Use Cases

From reviewing documents to adding signatures, watermarks, and notes, PDF annotation tools are useful for professionals, students, and everyday users.

📄 Reviewing Documents✍️ Adding Signatures📝 Adding Notes & Highlights📑 Reorganizing Pages🔏 Watermarking PDFs📊 Marking Up Reports📚 Reviewing Research Papers🏢 Working with Business Documents

💡Tips & Best Practices

  • ✓Select multiple pages with Ctrl+Click (or Cmd+Click) to delete or rotate them in bulk.
  • ✓Use the eraser tool to remove individual annotations from any page.
  • ✓The undo/redo feature (Ctrl+Z/Ctrl+Y) makes experimenting with annotations risk-free.
  • ✓Click “Download PDF” to save your document with all annotations flattened into the final file.

Frequently Asked Questions

Yes – drag thumbnails in the sidebar or use the up/down buttons on each page.
Yes – click the trash icon on a thumbnail, or select multiple pages and use the bulk delete button.
Yes, but pages with annotations cannot be rotated. Clear annotations first or rotate before annotating.
Absolutely – everything happens in your browser. No data is sent to any server.
Yes – choose from pen, text, shapes (rectangle, circle, line, arrow, star, triangle, ellipse), and highlighter.
Yes – use the "Insert Image" button and the watermark dropdown to add text or image watermarks.
Yes – draw or type a signature and save it locally. The 10 most recent are kept for quick reuse.