# Annotate PDF Documents

> Add highlights, notes, shapes, and text annotations to PDF documents with an easy editor.

Live tool: https://lofttools.com/tools/pdf-tools/annotate-pdf

Category: PDF & Documents

## How it works

1. **Select PDF** — Drop a PDF to mark up, or click to choose one from your device
2. **Add annotations** — Use highlight, text, shapes, and sticky note tools to annotate
3. **Download** — Download your annotated PDF instantly

## FAQ

### What annotation tools are available?

Highlight, underline, strikethrough, sticky notes, text boxes, freehand drawing, arrows, and shapes.

### Does this preserve bookmarks and form fields?

Yes. Existing bookmarks, form fields, and other annotations remain intact; new highlights and notes are appended as a separate annotation layer.

### What PDF versions are supported?

Reads PDF 1.0 through 2.0. Output is written as PDF 1.7 (the version that introduced the modern annotation dictionary).

## Privacy

This tool runs entirely in the browser. Files are not uploaded to a server. They never leave the user's device.

## More

- All tools: https://lofttools.com/tools
- Category: https://lofttools.com/tools/pdf-tools
- LLM index: https://lofttools.com/llms.txt