PDF Attachments
Embed files inside a PDF, rename or remove embedded attachments, and extract them — all in one place, entirely in your browser.
About PDF Attachments
A PDF That Carries Its Own Files
A PDF can hold more than pages. The format has a built-in attachments mechanism — an embedded-files name tree — that lets a document carry spreadsheets, source data, images, or any other file inside itself. Recipients open the attachment panel in any PDF reader and pull the files out, no extra tooling needed.
This tool covers the whole lifecycle in one place: attach new files, rename or remove what's already embedded, and extract attachments back to your device. It reads both document-level attachments and file-attachment annotations pinned to a page.
Three Tabs, One Job
Everything around embedded files lives behind three tabs.
Add
Attach up to 50 files of any type — spreadsheets, images, source files — up to 500 MB total. They embed at document level, visible to every reader.
Manage
See every embedded file with its size, rename entries for clarity, and mark attachments for removal. Nothing is written until you save.
Extract
Download any embedded file individually, or pull everything out at once as a ZIP archive.
Fully Local
The PDF and its attachments are read and rewritten in your browser. Nothing is uploaded — closing the tab wipes the data.
When Attachments Beat a Zip
Attach files when the document and its supporting material should travel as one unit: a report with its source data, a contract with its annexes, a project package with assets. Unlike a zip, the bundle opens in any PDF reader and the attachments are one click away from the pages that reference them.
Two honest limits: encrypted PDFs can be read and their attachments listed, but saving rebuilds the file from page images — the text layer is lost, so unlock the file first if text matters. And while any reader can extract attachments, not every mobile viewer surfaces the attachment panel prominently.
How It Compares
Embedding files in the PDF versus the usual workarounds.
| Feature | OxygenPDF | Zip alongside the PDF | Cloud link in the document |
|---|---|---|---|
| Files travel inside the document | |||
| Works offline for the recipient | |||
| Rename / remove embedded files | |||
| No upload, runs locally |
PDF Attachments: Frequently Asked Questions
Common questions about this tool and how it works.
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Continue working with your PDFs
Edit PDF
Add text, images, drawings, shapes, and highlights to your PDF.
Annotate PDF
Highlight, underline, add sticky notes, stamps, and comments without changing the document.
Insert Watermark
Add text, image, or pattern watermarks to your PDFs.
Remove Watermark
Detect and remove watermarks from PDF documents.
Add Page Numbers
Add customizable page numbers to your PDF.
Add Header & Footer
Add text headers and footers to your PDF pages.