Embed File Attachment in PDF
Attach a file (XLSX, DOCX, JSON, image, etc.) inside a PDF — viewers display attachments in their side panel.
1. Upload your files (min 2)
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.