Can You Attach a PDF as a Comment in Adobe Acrobat for iOS?
Question details
The user wants to know if it is possible to attach or link another PDF file as a comment within the Adobe Acrobat app for iOS, similar to how it works on desktop versions.

- Product
- Adobe Acrobat for iOS
- Device & OS
- iOS
- Scenario
- Annotating a PDF document on an iPhone or iPad and attempting to embed a supplementary PDF file into a comment.
- Observed behavior
- The iOS app supports standard annotations like text notes and highlights, but lacks the native desktop capability to attach or embed another file directly into a comment.
Ensure your PDF files are backed up to a cloud storage service like iCloud, Google Drive, or Dropbox, as you will need to rely on cloud links to reference external files on iOS.
Use a Desktop PDF Editor for File Attachments
Since iOS mobile apps do not support embedding files directly into PDF comments, switching to a Windows or macOS desktop application is the most reliable solution.
Desktop PDF software provides full support for advanced rich media and file attachment features that are restricted by mobile operating systems' sandboxing rules.
Transfer your primary PDF to a Windows or Mac computer and open it using a desktop PDF editor like Adobe Acrobat or WPS Office.
Navigate to the 'Comment' or 'Annotate' toolbar and locate the 'Attach File' (paperclip) icon.
Click on the exact location in the document where you want the comment to appear, browse your computer files, and select the secondary PDF to attach it.

Insert Cloud Document Links as Text Comments on iOS
If you must work exclusively on an iOS device, use a standard text note to paste a cloud-hosted link to your secondary PDF file.
Edit and Annotate PDFs Easily with WPS Office
While mobile PDF apps often have strict limitations, WPS Office provides a powerful, lightweight, and free alternative to traditional office and PDF software. Enjoy advanced PDF tools and seamless document compatibility across Windows, Mac, iOS, and Android.
- 1. Download WPS Office: Install WPS Office from the official website or your device's app store.
- 2. Open your PDF document: Launch the application and open the PDF file you wish to review or edit.
- 3. Use advanced annotations: Navigate to the 'Comment' tab to utilize a wide range of free annotation and markup tools.

Frequently Asked Questions
What annotation tools are available in Adobe Acrobat for iOS?
The iOS version of Adobe Acrobat supports a variety of standard markup tools, including sticky notes, text highlights, freehand drawing, text boxes, and strikethrough. However, embedding physical files into comments is not supported.
Can I view desktop-attached PDF files on my iPhone?
Mobile PDF viewer capabilities vary. While you cannot create new file attachments as comments on iOS, some PDF reader apps allow you to view or open files that were previously attached to the document using a desktop computer.
Why are file attachments restricted in mobile PDF applications?
Mobile operating systems like iOS utilize strict file system sandboxing and memory management protocols. Handling embedded file attachments natively inside another document is highly complex on mobile compared to the open file systems used on desktop operating systems.
Is there any way to merge two PDFs on an iPhone instead of commenting?
Yes, instead of attaching one PDF as a comment to another, you can use PDF utility apps or premium features within Acrobat and WPS Office to merge both PDFs into a single, continuous document.




