Merge PDF, online, free and secure
Combine multiple PDF files into one document. Sort via drag & drop, merge and download. 100% free, no sign-up, GDPR compliant.
Merge multiple PDF files into one document
With PDF Monster's PDF Merge Tool, you can quickly and easily combine multiple PDF files into a single document. The entire process takes place directly in your browser, no software installation, no registration and no hidden costs. Whether you want to bundle application documents, consolidate invoices or combine project reports: Upload your files, set the order via drag & drop and get your merged PDF in seconds.
The special thing: When merging, texts, images, fonts, links and formatting are fully preserved. There is no recompression, so the original quality of your documents is guaranteed. Combining PDFs has never been this easy.
How it works, merge PDFs in 3 steps
Upload PDF files
Drag and drop your PDF files into the upload area or click the button to select files. You can upload multiple files at once.
Sort order via drag & drop
Arrange the uploaded PDFs in your desired order. The preview shows you each file so you can check the result before merging.
Merge and download
Click "Merge PDFs" and download your finished document. Processing takes only a few seconds.
Why use PDF Monster to merge PDFs?
Multiple PDFs at once
Upload up to 10 PDF files at once and combine them into one document with a single click.
Drag & drop sorting
Intuitively set the order of your files via drag & drop. The preview shows the result in advance.
Secure and confidential
SSL encryption during transfer, automatic deletion after processing. Servers in Germany.
Full original quality
No recompression, text, images, links and fonts remain exactly preserved.
Why PDF Monster is secure
Data security is PDF Monster's top priority. We know you entrust us with confidential documents, and we take this responsibility seriously.
Encrypted transfer
All data is transferred via a 256-bit SSL encrypted connection. Third parties cannot view your files during upload.
Automatic deletion
After processing, your files are automatically removed from our servers. No copies or caches remain.
No sharing with third parties
Your documents are never shared with third parties, not used for advertising and not permanently stored.
Servers in the EU
Processing takes place on servers in Germany. Compliance with GDPR and European data protection standards is guaranteed.
Our privacy policy transparently explains how we handle your data. PDF Monster was built to provide you with a secure and trustworthy tool for daily PDF work.
Typical use cases for merging PDFs
Bundle application documents
Combine resume, cover letter, certificates and references into a single PDF file. Many employers expect bundled application documents as one document.
Combine invoices and receipts
Merge individual invoices, receipts or vouchers into one clear PDF for accounting or tax returns.
Compile contracts
Combine contract documents, attachments and supplementary agreements into a complete contract, ideal for sending or digital archiving.
Unite project reports
Merge individual chapters, tables and presentations from different sources into a comprehensive project report.
Academic papers
Create cover page, table of contents, text sections and appendices as individual files and then merge them into a complete submission file.
Documents for email
Combine multiple PDFs into one attachment instead of attaching individual files. This keeps the email tidy and the recipient has everything in one document.
Frequently asked questions about merging PDFs
How many PDFs can I merge?
You can merge up to 10 PDF files at once, with each file up to 50 MB in size. For larger projects, you can simply repeat the process and merge the results again.
Is merging PDFs really free?
Yes, PDF Monster is 100% free with no hidden costs. There are no watermarks, no registration required, and no usage limitations.
Are my files secure?
All uploads are transmitted via an SSL-encrypted connection. Your files are automatically deleted from our servers within one hour after processing.
Can I change the page order?
Yes! After uploading, you'll see a preview of all files and can rearrange them via drag & drop into your desired order. This gives you full control over the final result.
Does PDF Monster work on mobile?
Yes, PDF Monster is fully responsive and works perfectly on smartphones, tablets, and desktop computers. The interface is intuitive and easy to use on all devices.
What file formats can I merge?
PDF Monster exclusively supports the PDF format. If you want to merge other files like Word, Excel or images, first convert them to PDF using our conversion tools and then merge them.
Does the file size increase when merging?
The size of the merged PDF roughly equals the sum of the individual files. No additional compression or enlargement takes place. If the result is too large, you can reduce it afterwards with our compression tool.
Can I merge password-protected PDFs?
Password-protected PDFs need to be unlocked before merging. Use our PDF unlock tool to remove the protection, then merge the files.
Merge PDFs online, no software, right in your browser
PDF Monster offers you a complete collection of free PDF tools. Besides merging PDFs, you can also split, compress, edit or convert your documents to other formats like Word. All tools work directly in the browser, are GDPR compliant and require no installation or registration.