How to Attach Files and Photos to a PDF on iPhone with Fileso

Sometimes a PDF needs its source spreadsheet, an original photo, or another document alongside the page. Fileso can embed one of those files as a FileAttachment annotation at a chosen point in the PDF. The paperclip marks where the attachment belongs, while the file’s bytes and name are saved inside the document.

Attach a file from Files or Photos

1. Open the PDF in Fileso and switch to Annotate mode.
2. Tap Insert → Attachment. Choose File from Files for a document in the Files picker, or File from Photos for an image or video in your photo library.
3. Select one item and wait for Fileso to prepare it.
4. Tap the PDF page where the paperclip should appear. Put it near the text or image that refers to the file.
5. Tap Save. Close and reopen the PDF, select the paperclip, and confirm that its View or Share Attachment action reaches the expected file.

Each selection places one attachment. Repeat the steps to add another file elsewhere in the PDF. Fileso copies the chosen bytes into the annotation, so the recipient does not need access to the original location in Files or Photos.

Preview and share the attachment

Selecting a saved paperclip offers View and Share Attachment. View uses iOS Quick Look for file types it can display. If Quick Look cannot preview that type, Fileso offers a share action so you can open it in a suitable app. A preview failure does not by itself mean the embedded file is missing.

The editor rejects an empty file or one larger than 100 MB. The PDF also grows by the size of its attachments, so check the final document before sending it through a service with attachment limits. If a photo has no filename extension from the picker, Fileso adds one where possible so Quick Look can identify the saved type.

What the recipient will see

The PDF specification defines file attachment annotations, but PDF viewers differ in how they show paperclips and expose embedded files. Reopen the saved document in Fileso to verify the attachment, then test the reader your recipient uses if access to that file is essential. Do not assume that exporting the PDF as page images will preserve attachments: images contain only the visible page.

If you want a spoken explanation tied to the page instead of a downloadable supporting file, follow the PDF audio note guide.