Is this tool really free?

Yes, all our PDF tools are completely free to use with no hidden costs, subscriptions, or per-file charges. We support the service through non-intrusive advertising, not by charging for basic document operations. You can use any tool as many times as you like, with no daily limits, file size restrictions, or account requirements whatsoever.

Absolutely. All PDF processing happens directly in your browser using local JavaScript and WebAssembly libraries. Your files are never uploaded to any server, never stored in the cloud, and never transmitted over the internet. The files remain entirely on your device from start to finish, giving you complete control over your sensitive and confidential documents.

What types of files can I attach?

You can attach any file type to a PDF — documents, spreadsheets, images, videos, ZIP archives, executables, or any other file format. PDF attachments are embedded within the PDF container and travel with the document. Recipients using a PDF reader that supports attachments can extract and open the attached files directly from within the PDF viewer.

Is there a size limit for attachments?

There is no specific limit enforced by the tool, but very large attachments significantly increase the PDF file size and may make the resulting document unwieldy to share. For practical purposes, keep total attached file sizes reasonable for your intended distribution method. Attaching files over 10-20MB may cause the combined PDF to be too large for email transmission.

How do recipients access the attached files?

Recipients open the PDF in any standard PDF reader that supports attachments — including Adobe Acrobat Reader, Foxit Reader, and PDF viewers in modern browsers. They access attachments through the attachments panel (usually an icon in the sidebar), see the list of attached files, and can save each attachment to their device. Not all minimal PDF viewers display the attachments panel.

Can I add a description to each attachment?

Yes, when adding attachments you can enter a description or notes for each file. The description appears alongside the file name in the PDF reader's attachments panel, helping recipients understand the purpose or contents of each attached file without needing to open it. This is useful when attaching multiple files with similar names or formats.

Are attachments searchable within the PDF?

The attachment descriptions and file names are part of the PDF's metadata and can be listed in the attachments panel. However, the content inside attached files is not searchable through the PDF's text search function — you would need to extract and open the individual attachment to search its contents using the appropriate application.

PDF Tools

Client-side processing

Organize

Merge PDF
Split PDF
Rotate PDF
Page OrganizerNew
Reverse PagesNew
Insert PagesNew
Duplicate PagesNew
Interleave PDFsNew
Delete PagesNew
Extract PagesNew

Edit

Watermark PDF
Header & Footer
Add Page NumbersNew
Flatten PDFNew
Crop PDFNew
Sign PDFNew
Redact PDFNew
Stamp PDFNew
Add BackgroundNew
Bates NumberingNew
Add BookmarksNew
Add LinksNew
Add AttachmentsNew
Page LabelsNew
Add MarginsNew
Auto-CropNew
Remove AnnotationsNew
Fill PDF FormNew

Security

Encrypt PDF
Unlock PDFNew
Remove MetadataNew
Remove JavaScriptNew

Analyze

Extract Content
PDF Statistics
Compare PDFs
Edit MetadataNew
Repair PDFNew
PDF to TextNew
Extract AttachmentsNew
OCR PDFNew
Validate PDFNew
Visual CompareNew

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All processing happens in your browser. No files are uploaded to any server.

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