Merge PDF
Combine multiple PDF files into a single PDF document.
Drag & drop PDF files here or
Maximum file size: 100 MB
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Secure
Your files are transferred over secure HTTPS and automatically deleted after 1 hour.
Fast
Merge your PDF files in seconds with high-performance servers.
Easy
Upload your files with drag & drop and merge with one click.
Merge PDF Files Online
Use MarsPDF to combine multiple PDF files into a single document directly in your browser. Merging PDFs helps organize, share, upload, and print files more efficiently without installing any software.
Whether you need to combine reports, forms, scanned pages, or attachments, our Merge PDF tool lets you arrange your files in any order and merge them into one clean PDF document quickly.
How to Merge PDF Files
Upload Your PDFs
Select or drag and drop the PDF files you want to combine.
Arrange the Order
Drag and drop files to arrange them in the correct page order.
Combine & Download
Click the merge button to combine them and download the final PDF document.
Why Combine PDF Files?
Keeping related pages in separate files can be confusing and hard to organize. Merging PDFs allows you to combine multiple documents into a single file, making it much easier to share, email, or archive.
This is highly useful for school assignments, business reports, legal contracts, tax documents, or scanned invoices where pages belong together in a specific sequence.
Will Merging PDFs Change the Quality?
No. Merging PDF documents simply combines pages into one file and does not reduce document quality or formatting. The layouts, fonts, and images in the original files are preserved.
If the combined file is too large for emailing or uploading, you can easily use our Compress PDF tool afterwards to optimize and shrink the file size.
Secure Online PDF Merging
Your privacy and data security are protected. Uploaded documents are processed securely over HTTPS and automatically deleted from our servers within 1 hour.
We do not manually review, back up, or share user files, ensuring your documents remain completely private.
Frequently Asked Questions
Is the Merge PDF tool free to use?
Yes. MarsPDF provides a free online tool to combine multiple PDF files directly in your browser.
Do I need to install software to merge PDFs?
No. You can merge PDF files online directly in your browser without installing desktop software or browser extensions.
Can I merge password-protected PDF files?
If a PDF file is password-protected, you must unlock it before combining it with other files.
How many files can I merge at once?
You can upload and combine up to 20 PDF files at the same time.
Can I change the order of files before merging?
Yes. You can drag and drop your uploaded files in the sidebar list to arrange them in the exact order you want.
Are my files stored on your servers?
No. All uploaded and merged files are stored temporarily and automatically deleted permanently after 1 hour.