Annotate PDF
Annotate PDF files online for free. Add text, highlights, drawings, and images to any page, right in your browser.
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How to Annotate a PDF
Need to annotate a PDF? ToolifyPDF is a free online PDF annotator that lets you add text, highlights, freehand drawings, and images to any page of your PDF, right in your browser. Mark up a report, add notes to a lecture handout, highlight key passages, or draw arrows and circles to point things out, then download the annotated PDF. You can even place the same annotation on several pages at once. No software to install, no account needed. To sign a document, try our Sign PDF tool, and to change the existing text, use Edit PDF.
Text, Highlights, Drawings & Images
Add text boxes with your choice of font, size, color, and style, highlight areas with a see-through marker, draw freehand with the pen, and insert images such as logos or stamps. Use the eraser and undo to fix mistakes.
Annotate Several Pages at Once
Place an annotation on the current page only, on every page, on all pages but the last, on the last page, or on a custom range of pages. Perfect for adding the same note or stamp across a whole document.
How to Annotate a PDF
- Select File: Click "Select File" or drag and drop your PDF into the box.
- Annotate: Pick the pen, highlighter, text, or image tool and add your annotations on any page.
- Adjust: Change colors, sizes, and opacity, move or resize annotations, and use undo if needed.
- Save: Click "Save" to apply your annotations to the PDF.
- Download: Download your annotated PDF.
Annotate PDF Files on Mac, Windows, iPad, and Android
ToolifyPDF works in any modern browser. You can annotate PDF files on Mac, Windows, Linux, iPad, iPhone, or Android without installing software. Works in Safari, Chrome, Firefox, and Edge.
Why Annotate PDF Files Free with ToolifyPDF?
Unlike Adobe Acrobat and other desktop PDF editors that require installation or a subscription, ToolifyPDF lets you annotate PDF files online from any device. Our free PDF annotator is perfect for:
- Adding notes and comments to school assignments and lecture slides
- Reviewing reports and marking corrections in red
- Highlighting important passages in articles and study material
- Adding a logo, a stamp, or a picture of your signature to a document
- Pointing out changes on design drafts by drawing arrows and circles
FAQ
How do I annotate a PDF?
Upload your PDF to ToolifyPDF, choose a tool from the toolbar (pen, highlighter, text, or image), and add your annotations on any page. When you're done, click Save and download your annotated PDF. You don't need Adobe Acrobat or any other software.
Is this PDF annotator free?
Yes. ToolifyPDF lets you annotate PDF files for free, with no hidden fees, no watermark, and no sign-up.
What can I add to my PDF?
You can add text with your choice of font, size, color, bold, italic, and underline; see-through highlights; freehand pen drawings; and images such as a logo, a stamp, or a picture of your signature. Every annotation can be moved, resized, recolored, or deleted before you save.
How do I highlight text in a PDF?
Choose the highlighter tool and draw a box over the text you want to highlight. You can pick the color and transparency, then move or resize the highlight afterwards.
Can I add the same annotation to several pages?
Yes. When you place an annotation, you can apply it to only the current page, all pages, all pages but the last, the last page, or a custom range of pages.
How do I annotate a PDF on Mac or iPad?
On a Mac, Preview has a Markup toolbar, and on iPad you can mark up PDF files in the Files app with your finger or Apple Pencil. ToolifyPDF works in Safari on both, with extra options like adding the same annotation to many pages at once.
Can the annotations be edited later?
Your annotations are added directly onto the pages, so they look the same in every PDF viewer and can't be removed by accident. This also means other apps can't edit them as separate comments, so keep a copy of your original PDF if you might need changes.
Can I annotate a password-protected PDF?
Yes. If your PDF is protected with a password, you'll be asked to enter it before you start annotating.
What is the maximum file size?
You can annotate one PDF at a time, up to 200MB.
Is it safe to annotate PDF files online?
Yes. Your files are uploaded over encrypted HTTPS connections and processed on secure servers. All uploaded and annotated files are automatically deleted one hour after processing, and we never share your documents with third parties.
Advanced Features
Beyond basic annotation, our PDF annotator offers several advanced features:
- Text Formatting: Choose the font, size, color, opacity, bold, italic, underline, and alignment.
- Highlighter: Mark areas with a see-through color you can move and resize.
- Freehand Pen: Draw with any color, line width, and opacity.
- Images: Insert logos, stamps, or other pictures and resize them.
- Multi-Page Placement: Apply an annotation to one page, all pages, or a custom range.
- Undo, Redo & Eraser: Fix mistakes in one click.
💡 Pro Tip
Use different colors for different kinds of notes: yellow for key points, red for corrections, and blue for general comments. Keep the highlighter opacity low so the text underneath stays easy to read.
Privacy & Security
We take your privacy seriously. All file uploads and processing happen over encrypted HTTPS connections. Your files are automatically deleted from our servers after one hour, and we never store or share your documents with third parties. You maintain complete control over your data at all times.
Ready to annotate your PDF?
Start marking up your documents now. It's free, fast, and requires no registration.