Embed File Attachment in PDF

Attach a file (XLSX, DOCX, JSON, image, etc.) inside a PDF — viewers display attachments in their side panel.

Your files never leave your browser. All processing happens on your device — nothing is uploaded.

1. Upload your files (min 2)

Need at least 2 files (have 0).

How does the Embed File Attachment in PDF work?

Embed an external file inside a PDF — the spec calls these "file attachments" and PDF viewers (Adobe Reader, Preview, Foxit, browser PDF panes) display them in a side panel where the user can extract them. Common patterns: ship a PDF report with its source XLSX, embed the original RAW image inside a PDF photo deck, bundle JSON metadata alongside a print-ready PDF for press automation. The attached file is stored as bytes; the PDF grows by roughly that size plus a small overhead. Files are processed in your browser — nothing is uploaded.

🔒 Security & Privacy

All processing happens on your device. Your files never leave your browser, never touch our servers, and are not stored anywhere. Close the tab and the file is gone.

📱 Use it on any device

Works in any modern browser — Mac, Windows, Linux, iPhone, Android, and tablets. No installation, no app to download. Just open the page and start.

⚡ Quick & easy

Drag, drop, click. Most files process in seconds, not minutes. No watermarks added to your output, no per-day limits, and the tool always shows the result before asking you to download.

🎁 Always free, no signup

Free to use, every time. No account creation, no email required, no “trial” that converts to a paid plan. We make money from ads so you don’t have to pay.

Frequently asked

Most modern tools preserve attachments. Some legacy print-stage tools strip them; if the recipient relies on the attachment, ask them to verify with their viewer first.

For heavier PDF workflows

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Adobe Acrobat Pro (subscription)
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Nitro PDF Pro (one-time license)
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Portable document scanner (ADF, duplex)
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