Add attachment
Embed any file (spreadsheet, image, source data) inside a PDF.
Drop your file here
How to use Add attachment
- 1
Choose a file (.pdf) or drop it into the box.
- 2
Adjust the options to suit your needs.
- 3
Click “Add attachment” and download the result: pdf.
Your documents are processed entirely inside your browser. They are never uploaded to PDF100 or any third party, so Add attachment is suitable for confidential files. Read our privacy policy.
Add attachment questions
Is Add attachment free?
Yes. Add attachment on PDF100 is free with no account, no watermark and no daily limit. The site is supported by advertising.
Are my files uploaded when I use Add attachment?
No. Add attachment runs entirely inside your browser tab. The file is read and processed on your device and the result is saved straight to your downloads, so no copy reaches our servers.
Which files does Add attachment accept?
Add attachment accepts .pdf. The result is: pdf.
Is there a file size limit?
There is no fixed limit set by PDF100. Because processing happens on your device, the practical limit is your browser memory. Very large files work best on a desktop computer.
Does Add attachment work on my phone?
Yes. Add attachment works in current versions of Chrome, Safari, Edge and Firefox on desktop and mobile. Large documents are faster on a computer.
More security & privacy tools
- SEC
Protect PDF
Encrypt a PDF with a password using AES-256.
- SEC
Unlock PDF
Remove the password and encryption from a PDF you have access to.
- SEC
Restrict permissions
Prevent printing, copying or editing with an owner password.
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Redact PDF
Permanently black out words, emails or phone numbers. Redacted text is truly removed.
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Remove metadata
Strip author, title, software and XMP metadata from a PDF.
- SEC
Edit metadata
Change the title, author, subject and keywords of a PDF.
- SEC
Sanitize PDF
Remove JavaScript, auto-run actions, embedded files and hidden metadata.
- SEC
Extract attachments
Save all files embedded inside a PDF.