Annotate PDF

When you study, teach or review documents, you need to mark important points directly on PDF pages. The Annotate PDF tool by Smart Maker is a complete annotation editor that lets you highlight text, underline, strikeout, draw rectangles and add custom text anywhere on PDF pages, all directly in your browser.

What can you do with this annotation editor?

• Highlight important text and areas with custom color and opacity
• Draw rectangle around important content to focus attention
• Underline key points and definitions for quick revision
• Strikeout to mark wrong or outdated content
• Add custom text anywhere – comments, corrections, notes
• Drag on page to create annotation, click existing annotation to remove it
• Customize color, opacity, line width for shapes and font size for text
• Navigate pages with Next / Previous, see total annotations and current page count
• Clear annotations on current page or clear all annotations at once
• Create annotated PDF and download with custom file name

Annotation types explained

Highlight: Best for marking important lines with transparent color. Rectangle: Draw a box around a table, image or paragraph. Underline: Classic line under text for key definitions. Strikeout: Cut line through text to show deletion or error. Text: Add your own comments like "Important", "Check this" anywhere. You can change color – yellow for general, green for positive, red for correction.

Why annotate PDF?

Students highlight and underline notes in textbooks for exam revision. Teachers mark corrections and add comments on assignments. Office workers annotate reports and contracts to highlight key data and add suggestions. Unlike printing and using a pen, digital annotation keeps original PDF layout clean and you can remove or edit annotations anytime without damaging the document.

How to annotate a PDF

1. Upload your PDF file.
2. Select annotation tool – Highlight, Rectangle, Underline, Strikeout or Text.
3. Choose color, opacity, line width and font size from settings.
4. Drag over the area on page to create annotation – for text, click where to add.
5. Use Next / Previous to move between pages and annotate all pages.
6. Click on any annotation to delete it if needed, or clear current page.
7. Click Create Annotated PDF and download your final annotated file.

What happens after annotation?

All your highlights, shapes and text notes are embedded into a new PDF as annotation layer over original content. Original PDF text remains selectable and quality is preserved. You get live counts of total annotations and current page annotations so you can track your work.

Privacy, security and pricing

All annotation happens locally in your browser. Your PDF is never uploaded to any server, no file is stored and confidential files stay completely safe. Only resume and biodata tools need login on Smart Maker. This editor is free forever, no signup, no watermark, mobile friendly, works without internet after page load and supports unlimited use with original quality kept.