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PDF Annotator

Free PDF annotator tool to draw, highlight, underline, and add text annotations to documents. Markup PDF files securely in your browser.

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•Max 100MB per file

How to Annotate PDF Documents

Use our free PDF annotator tool to draw, highlight, underline, and add text annotations to documents. Markup PDF files with professional annotation tools.

  1. 1

    Select Your PDF Document

    Select your PDF file or drag and drop it into the file selection area. Our PDF annotator supports documents up to 100MB. All processing happens in your browser - your file never leaves your device.

  2. 2

    Choose Annotation Tools

    Select from various annotation tools: highlight text, underline passages, draw freehand with the pen tool, add text boxes, or create shapes. Our PDF markup tool provides professional annotation capabilities for reviewing and editing documents.

  3. 3

    Add Annotations to Your PDF

    Click and drag to highlight text, draw freehand annotations, add text comments, or create shapes. The PDF annotator allows you to markup documents with multiple annotation types. All annotations are saved directly to your PDF document.

  4. 4

    Download Annotated PDF

    Download your annotated PDF document with all markup, highlights, drawings, and text annotations included. The free PDF annotator processes everything in your browser - your documents never leave your device, ensuring maximum privacy and security.

100% Private PDF Annotation: All annotation happens locally in your browser. Your documents never leave your device - no server uploads, no data collection. Annotate and markup documents with complete privacy and security.