Skip to content
ToolsOnDuty - free online tools
PDF Tools

PDF Annotator

Draw page-specific highlights on a PDF with a live visual preview.

Free foreverRuns in your browserNo sign-up
Drop a PDF here, or click to choose
Processed locally in your browser.

About the PDF Annotator

PDF Annotator lets you drag translucent highlight boxes over important passages, table cells or visual regions. Each annotation is tied to the page where it was created.

Choose a highlight colour and opacity, move between pages, undo mistakes and save a new PDF while the original remains unchanged.

Key features

  • Live page preview
  • Page-specific highlights
  • Custom colour and opacity
  • Undo and clear controls

How to use

  1. 1Upload a PDF and choose a page.
  2. 2Drag over each area to highlight it and adjust the colour or opacity.
  3. 3Review the count and save the annotated PDF.

Examples

Review a contract
Input: Contract PDF
Output: Copy with yellow highlights

Use redaction, not highlighting, for content that must be permanently hidden.

Frequently asked questions

Can I annotate multiple pages?
Yes. Switch pages and add highlights wherever needed before saving.
Can highlighted text still be selected?
Yes. Highlights are translucent overlays and do not remove the original text layer.
Does this change my original file?
No. It downloads a separate annotated copy.