Is it free to merge PDF files with dokk.ai?

Yes. You can merge PDF files for free with no watermarks, no file size limits, and no registration required. Premium plans offer higher daily usage limits and priority processing, but the merge tool itself is fully functional on the free tier.

How many PDF files can I merge at once?

There is no hard limit on the number of files you can merge. You can combine two PDFs or a hundred — the tool handles large batches just as reliably. Upload all your files at once, reorder them with drag-and-drop, and merge in a single click.

Will merging PDFs reduce the quality of my documents?

No. Dokk.ai merges files at the structural level without re-encoding images or re-rendering text. Your original resolution, fonts, formatting, and embedded media are preserved exactly as they are in the source files.

Can I merge PDFs with images like JPG or PNG?

Yes. You can upload a mix of PDF files and images (JPG, PNG). The images are converted to PDF pages and inserted at the position you choose. This is useful for combining scanned receipts, photos, or screenshots with existing PDF documents.

Is it safe to merge PDFs online?

Yes. All file transfers are encrypted with TLS. Your documents are processed on our secure servers and automatically deleted after the merge is complete. We never read, analyze, or share your files. No account is required, so we do not collect personal information.

Can I merge password-protected PDF files?

If a PDF is password-protected, you will need to unlock it first using our Unlock PDF tool, then upload the unlocked version for merging. This ensures the file can be properly read and combined with others.

Does merging preserve bookmarks, links, and form fields?

Yes. Dokk.ai preserves bookmarks, hyperlinks, annotations, and interactive form fields from all source files. The merged output is a complete, fully functional PDF — not a flattened image.

Can I reorder pages before merging?

Yes. After uploading your files, you can drag and drop them into any order using the visual thumbnail interface. The first file in your list becomes the first section of the merged PDF.

How do I merge PDF files on a Mac or iPhone?

Dokk.ai works in any web browser — Safari, Chrome, Firefox, or Edge. Open dokk.ai on your Mac, iPhone, iPad, or any other device, upload your files, and merge. No app installation needed.

How can I reduce the file size of a merged PDF?

After merging, use our Compress PDF tool to reduce the file size. You can choose from multiple compression levels (screen, ebook, print quality) to balance size and visual quality. This is especially helpful when the merged file needs to be sent by email or uploaded to a portal with size restrictions.

All tools

Merge PDF

Combine multiple PDFs into one

1Upload

2Configure

3Process

Drop file here

PDF, Word, Excel, PowerPoint, images up to 25 MB

Key Features

Merge unlimited PDF files with no file count restrictions
Drag-and-drop reordering with live page thumbnails
Preserves bookmarks and hyperlinks from all source files
Maintains original formatting and image resolution
Supports mixed input — combine PDFs with images (JPG and PNG)
No watermarks added to the output file
No registration or account required to merge
Instant processing — results ready in seconds
Works on any device — Windows and Mac and Linux and mobile
TLS encryption and automatic file deletion after processing
Batch upload — select all files at once
Compatible with all PDF viewers and readers

Use Cases

Consolidating monthly financial reports into a single archive for stakeholders
Merging signed contracts with appendices and schedules before filing
Combining a cover letter and resume into one PDF for job applications
Assembling client proposals with supporting documents and case studies
Preparing tax document packages with W-2s and 1099s and receipts
Organizing scanned documents from a multi-page scanner into one file
Bundling research papers and references for academic submission
Creating training manuals by merging individual lesson PDFs
Combining invoices and purchase orders for accounting workflows
Packaging product datasheets and spec sheets for distribution

How to Use

1Upload two or more PDF files by dragging them into the upload area or clicking to browse your device
2Arrange the files in your desired order by dragging the page thumbnails — the first file in the list becomes the first section of the merged PDF
3Click the Merge button to combine all uploaded files into a single document
4Download your merged PDF instantly — no email, no account, no waiting
5Optionally, use Compress PDF or Add Page Numbers to further enhance your merged document

Need to combine multiple PDFs into one document? Whether you are consolidating monthly reports, assembling contract packages with signed annexes, bundling project deliverables for a client, or organizing tax documents before filing — merging PDFs should take seconds, not hours of copy-pasting. Dokk.ai's free online PDF merger lets you drag and drop your files, arrange them in any order, and produce a clean, unified document with one click. No watermarks, no registration, no software installation — everything happens securely in your browser. Unlike many online tools that strip metadata or degrade quality, dokk.ai preserves every detail from your original files. Bookmarks, hyperlinks, annotations, form fields, and embedded fonts are all carried over into the merged output. The page layout, resolution, and formatting remain pixel-perfect, so the merged document looks exactly like the originals — just combined into one file. This makes dokk.ai ideal for professional workflows where document integrity is non-negotiable: legal contracts, financial reports, academic papers, and regulatory submissions. Our merge engine handles documents of any size and quantity. Whether you are combining two one-page letters or merging a hundred multi-page reports into a single archive, the tool processes them with the same speed and reliability. For large batch jobs, you can upload all files at once and reorder them with drag-and-drop thumbnails before merging. The resulting file is available for instant download — no email address required, no waiting in queues. Dokk.ai works on every device and operating system. Merge PDFs on Windows, Mac, Linux, Chromebook, iPhone, or Android — all you need is a web browser. There is nothing to install, update, or configure. Your files are encrypted during transfer with TLS and automatically deleted from our servers after processing is complete. We never read, share, or store your documents beyond the time needed to perform the merge. If your merged PDF is too large to email, use our Compress PDF tool right after merging to reduce the file size without visible quality loss. Need to add page numbers or a watermark to the combined document? Chain multiple tools together — merge first, then enhance. Dokk.ai gives you a complete document toolkit, not just a single-purpose merger.

Frequently Asked Questions

Security & Privacy

Your files are protected with TLS encryption during upload and download. All documents are automatically deleted from our servers after processing is complete — we never store, read, or share your files. No registration is required, so we do not collect personal data to use this tool. Dokk.ai is designed to be GDPR-compliant and treats your document privacy as a fundamental right, not a feature.