Doom Converter

Attach a file to PDF

Embed a file inside a PDF and add an optional description. Keep a supporting document with a report without turning it into extra PDF pages.

Drop your PDF file here

Choose a file to get started.

Files stay on your device No sign-up Free to use

How it works

  1. 01

    Open the report PDF

    Select the destination PDF.

  2. 02

    Choose and describe a supporting file

    Choose the file to attach and add a description if needed.

  3. 03

    Test the embedded attachment

    Save the new PDF and inspect its attachment panel.

Attach a file to PDF
Edit & sign

Embed a supporting file inside a PDF document

Keep a source CSV with its report

A report needs to travel with its source CSV. Attach the CSV with a descriptive label and explain how recipients can find it. Choose the source CSV and describe it as the data behind the report. Export the PDF and test that a compatible reader can save the CSV unchanged.

✓ Open the attachment panel in a compatible reader and save the embedded file; compare its bytes to the original.

Make it work for your document

Options after selecting a file

Supporting file

Choose the local file to embed in the PDF.

Its bytes add to output size, and embedding does not scan or encrypt the attachment.

Description

Add optional context for readers browsing the attachment list.

The receiving viewer may hide this description or the attachment list entirely.

Frequently asked questions

The details, when you need them.

Does the attachment become a new page?

No. Use Merge PDF if you want to add PDF pages to the reading sequence.

Can I attach a spreadsheet?

Yes. It remains an embedded spreadsheet file.

Keep supporting material together

An attachment can hold the original spreadsheet behind a report or a related document that readers may need. The attached file keeps its own format and is not converted into PDF pages. Attaching a large file also increases the PDF size, so check the requirements of any upload portal.

Use a viewer that exposes attachments

Not every browser viewer shows a PDF attachment panel. Test the result in a reader that supports embedded files, or use Extract PDF attachments to verify the contents. Attaching a file does not encrypt it independently, and recipients who can access the document may also access its embedded files.

Viewer support and file-size costs

Not all viewers expose attachments. Embedding is not merging pages, encryption or malware scanning, and increases the PDF size.

The recipient cannot see the attached file

Some browser PDF viewers do not display embedded document attachments. Ask the recipient to use a viewer with an attachment panel or send the supporting file separately.

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