Add attachments to PDF
Embed one or more files as attachments inside a PDF (compatible with PDF/A-3b).
Quick guide
- Upload your PDF
- Adjust options if needed
- Download the result
Add attachments to PDF
Embed one or more files as attachments inside a PDF (compatible with PDF/A-3b).
Add attachments to PDF
Adding attachments to a PDF embeds other files — documents, spreadsheets, images, or any file type — inside the PDF container. The attachments travel with the PDF when shared.
Recipients with a compatible PDF reader can open the embedded files directly from the PDF without receiving them separately.
Used for self-contained document packages: a contract with attached annexes, a report with supporting data files, or documentation with related assets embedded.
Frequently asked questions
Is this tool free?
Yes, Add attachments to PDF is completely free. No sign-up or account required.
Are my files secure?
Yes. Uploaded files are automatically deleted from our servers after processing. We never store copies of your documents.
What is the maximum allowed file size?
You can upload files up to 50 MB.
Do I need to install anything?
No. The tool works entirely online, directly from your browser, with no installation required.