Annotate PDFMarch 16, 20263 min read

How to Annotate a PDF on iPhone Free

Highlight, comment, and mark up a PDF on iPhone. Built-in Markup tool and free browser options.

iPhone has a built-in Markup tool for PDF annotation. For more options, use FixMyPDF in Safari.

Method 1: Files App Markup (Built-In)

Open PDF in Files. Tap the pen icon. Use highlighter, pen, text tools. Tap Done → Save.

Open Safari. Go to fixmypdf.in/tools/annotate-pdf. Upload. Add highlights, comments, shapes. Download.

Import PDF into the Books app. Tap and hold text to highlight. Add notes via the context menu.

Browser-based, private, and instant. No account or software required.

Add comments, highlights, and notes to a PDF on Mac using Preview or browser tools — no Adobe Acrobat required.

Add highlights, comments, and handwritten notes to a PDF on iPhone using built-in iOS tools or Safari-based tools — no app download needed.

Add comments, text boxes, and notes to a PDF online for free — no account, no Adobe subscription. Works on any device and browser.

Add highlights, comments, and notes to a PDF on Windows 10 or 11 using Edge, Chrome, or browser tools — no Adobe Acrobat required.

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