How to Annotate a PDF on iPad — Best Free Methods in 2026
The iPad is one of the best devices in the world for PDF annotation, especially if you have an Apple Pencil. The combination of the large touchscreen, pressure sensitivity, and excellent iOS PDF support makes the iPad genuinely superior to most desktop setups for annotation work — and many of the best annotation tools are completely free. This guide covers the best free methods for annotating PDFs on iPad in 2026, from Apple's own built-in Markup tool to dedicated note-taking apps with free tiers, and explains when each approach is best suited. We'll compare highlighting, text comments, freehand drawing, shapes, sticky notes, and signature-level markups. Whether you're a student marking up research papers, a professional reviewing contracts, a teacher giving feedback on submitted work, or someone who just needs to sign a form with a quick note, there's a free annotation method on iPad that fits your workflow perfectly. No subscription to Adobe Acrobat required.
Apple Markup: The Free Built-In iPad PDF Annotator
Apple's Markup tool is pre-installed on every iPad and hidden in plain sight — most users don't know how capable it actually is. To access it, open any PDF in the Files app, then tap the Markup icon (pen nib symbol) in the upper right corner. Markup on iPadOS offers an impressive set of free annotation tools.
- 1Open your PDF in the Files app and tap the Markup icon to enter annotation mode
- 2Use the pen, pencil, or crayon tools for freehand drawing and handwriting — Apple Pencil provides pressure sensitivity for natural line variation
- 3Tap the highlighter tool (the thick line icon) and drag over text to highlight it in yellow, green, blue, or pink
- 4Tap the + button to add text boxes, shapes, speech bubbles, arrows, and your saved signature
- 5When finished annotating, tap Done and choose 'Save File' to embed annotations permanently, or share the annotated PDF directly via the Share button
Highlighting and Text Comments in PDF on iPad
Text highlighting is the most common annotation type for students and researchers. In Markup, select the highlighter tool and choose your color, then drag across any text passage. On iPad, dragging over text with the highlighter tool activates the text selection mode — you'll see the highlighted text turn the chosen color immediately. For more precise text selection, especially on small text, pinch to zoom in on the page first. The enlarged view makes it much easier to accurately highlight just the sentence you want rather than accidentally catching adjacent lines. Text comment notes (the sticky note equivalent in PDF annotation) are accessible in Markup via the + menu > Note. This adds a colored comment box that you can type into. However, for comprehensive comment systems with threads and resolved/unresolved states, you'll want to look at Adobe Acrobat Reader free or PDF Expert's free tier, which have more robust comment management. For academic paper review — where you might be adding dozens of comments across a long document — the free tier of PDF Expert (by Readdle) offers a better organized annotation interface than Markup, with comment lists, search, and export options that Markup doesn't provide.
Freehand Drawing and Handwriting Annotations on iPad
Where iPad truly excels over every desktop PDF annotation solution is in freehand annotation with Apple Pencil. The combination of low latency, pressure sensitivity, and tilt recognition creates a writing experience that feels almost indistinguishable from writing on paper. In Markup, the pen tool provides solid lines with pressure variation — useful for emphasis marks, circles, and underlines. The pencil tool simulates a textured pencil stroke for a more natural look. The crayon provides thick, slightly textured fills. For handwriting-heavy annotation workflows (like writing in the margins of a textbook PDF), consider the free tier of Notability or GoodNotes. Both apps offer excellent Apple Pencil support and are specifically designed for note-taking and annotation on iPad. Notability has a free tier with good functionality; GoodNotes 6 offers limited free use before requiring payment. A key tip for annotation with Apple Pencil: in most apps, resting the side of your hand on the screen while writing with the Pencil triggers palm rejection automatically — the app knows to ignore your palm and only track the Pencil. This makes extended annotation sessions comfortable without accidental marks.
Saving and Sharing Annotated PDFs from iPad
One of the most important aspects of PDF annotation on iPad is ensuring your annotations are properly saved and visible to others when you share the document. In Markup, annotations are embedded in the PDF file when you tap Done > Save File. The annotated PDF looks exactly the same in any PDF viewer — annotations are part of the file, not a proprietary overlay that only Apple apps can see. This means a colleague opening your annotated PDF on a Windows computer will see all your highlights and comments exactly as you added them. For sharing annotated PDFs by email, tap the Share icon in Files while the annotated PDF is selected, then choose Mail. The annotated version attaches automatically. If you want to share a 'flat' version of the annotated PDF — where annotations are merged into the page content and can't be removed separately — you can print to PDF. In any app, use Share > Print, then pinch to zoom on the print preview to get a PDF rendering option. This flattens all annotations into the page images. After annotation, if the PDF is large due to many image annotations or extensive markup, use LazyPDF's compress tool to reduce the file size before sharing — annotated PDFs can grow significantly in size if you've added many Pencil strokes or images.
Frequently Asked Questions
Does Apple Markup on iPad require an Apple Pencil?
No. Apple Markup works with your finger on any iPad. Apple Pencil provides a significantly better handwriting and drawing experience due to pressure sensitivity and tilt recognition, but all annotation types — highlighting, text boxes, shapes, signatures — work fine with finger touches on any iPad including models that don't support Pencil.
Can other people see my iPad PDF annotations when I share the file?
Yes, as long as you saved the annotations properly. When you tap Done in Markup and choose 'Save File', annotations are embedded in the PDF using standard PDF annotation format. Any PDF viewer — on Windows, Mac, Android, or web — will display them. If you accidentally chose 'Discard Changes', the annotations are not saved and need to be redone.
What is the best free PDF annotation app for iPad in 2026?
For most users, Apple's built-in Markup tool is the best starting point — it's free, always available, and works well for common annotation tasks. For more advanced annotation with organized comment lists, PDF Expert's free tier is excellent. For heavy handwriting annotation and note-taking, Notability's free tier or the base version of GoodNotes 6 is worth exploring. All three are significantly better than paying for Adobe Acrobat for annotation alone.
Can I annotate a password-protected PDF on iPad?
You need to enter the password to open the PDF first. If you know the password, the PDF opens normally in Markup and other annotation apps. If the PDF is protected against editing (not just against opening), some annotation tools may not be able to add annotations. In that case, use LazyPDF's unlock tool to remove the restriction password, then annotate freely.