Merge PDF Files

Combine multiple PDF documents into a single file. Upload individual PDFs or ZIP archives and merge them in your preferred order.

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More information about this conversion

From simple conversions to a more complex automation using workflows, PDFengine provides professional-grade tools for every PDF task.

Combine Multiple PDFs

Combine Multiple PDFs

Merge up to 50 PDF files into a single document. Upload individual files or ZIP archives containing multiple PDFs for efficient batch processing.

Enhanced administration and archiving with cover pages

Enhanced administration and archiving with cover pages

Give your merged PDF a professional start with a custom cover page. Add a logo, title, summary, or table of contents as the first page of any document, and apply it in seconds.

Greater efficiency with PDFengine workflows

Greater efficiency with PDFengine workflows

Take document management to the next level by combining and sequencing PDF conversion, optimalization, and/or organization tools. With fully customizable workflows, complicated PDF tasks cost just seconds to complete.

Why choose us to convert your files

Lightning Fast Conversion

Our advanced conversion engine processes your files in seconds, not minutes. Upload, convert, and download - all within moments.

Focus on business

Archive and convert email, AutoCAD, Visio, and Office files in one streamlined workflow. Perfect for companies with recurring document processes.

Perfect Quality Every Time

Our intelligent algorithms preserve formatting, fonts, images, and layouts. What you see is what you get - no quality loss.

How it works

Process your documents easily and quickly in three steps

1

Upload PDF Files

Select your PDF documents or upload ZIP archives containing multiple PDF files.

2

Arrange Order

Drag and drop to reorder your PDFs. The order will determine how they appear in the final merged document.

3

Download Merged PDF

Get your single merged PDF file with all documents combined in the order you specified.

Frequently Asked Questions

How many PDFs can I merge?

You can merge up to 200 PDF files with a total size of up to 500MB (Premium) or 200MB (Free/One-time credits).

Can I change the order of PDFs?

Yes, you can drag and drop PDFs to reorder them before merging. ZIP archives maintain their internal file order.

Will formatting be preserved?

Yes, all content, formatting, images, fonts, and metadata from your original PDFs are preserved in the merged document.

Why is it handy to convert my document to PDF?

Converting a file to PDF ensures your document stays consistent and accessible. PDFs lock in formatting, design, and structure, preventing layout shifts that can happen with editable file types. They’re compatible with virtually all devices and operating systems, making them ideal for professional documents, forms, reports, and presentations. PDFs are also easy to distribute; whether through email, downloads, cloud platforms, or QR-codes that let users open a file instantly on their phone.

Will documents lose quality when converted?

Our intelligent software minimizes quality loss when converting documents. As such, documents can be converted without having to worry about quality loss for a great number of times.

Will my document lay-out or format be changed if I convert it?

No; our intelligent PDF software recognizes document layouts and transforms them accurately onto a new file format. Was your lay-out or format not transformed accurately? Consider applying OCR, or applying different customization settings to convert it correctly.

Can I convert a document into PDF and convert it back into original format?

Yes! There are no limits to converting documents, and documents can safely and easily be converted back and forth. Conversion can be handy to edit a PDF document in Word, and later convert it back into an organized PDF format.

How can I merge PDF documents?

To merge PDF documents simply go to our converter, choose the file format you’re merging, and drag and drop the files you want to merge. Then you have the opportunity to edit some settings, press merge, and you’re done! You can download your merged file right away.

Can I customize my PDF documents while converting?

Yes, PDFengine offers various means of customizing your (PDF) documents. Consider adding a cover page, applying OCR, or using PDF/A as output.

Why is the text in my PDF not displayed correctly?

If the text is not copyable, clickable, or searchable, that means the text is not recognized within the PDF. Try uploading your document onto PDFen and applying OCR. OCR technology will make your text readable. In case it doesn’t work completely in one go: apply OCR a second time.

Ready to Merge Your PDFs?

Combine multiple PDF documents into a single file in seconds. No software installation required.

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