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Merge PDF

Combine several PDFs into one organized file for applications, reports, invoices, study material or sharing. No registration, no watermark, and secure automatic cleanup.

Supported: .pdfMaximum: 20 PDFs · 500 MB total · 50 MB eachUsually 5–60 seconds
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100% free · Unlimited useEncrypted upload · Automatic cleanup · No account required

How to use Merge PDF

  1. Choose between 2 and 20 PDF files.
  2. Arrange the files in the order they should appear.
  3. Select Merge PDF to combine every page.
  4. Download the single merged PDF.

Why merge PDF files?

  • One file is simpler to upload, email and archive than several attachments.
  • The order you choose is preserved in the combined document.
  • Merging keeps the source pages together without copying and pasting content.

Tips for the best result

  • Name source files in numerical order before selecting them.
  • Remove unnecessary pages with Organize PDF before merging.
  • Compress the merged result if an upload portal has a size limit.

Privacy and security

Uploads use encrypted HTTPS transfer. Filenames are sanitized, temporary working directories use unique identifiers, and generated files are removed automatically. Never upload a document unless you have permission to process its contents.

Learn more about file security and read the privacy policy.

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Frequently asked questions

Is Merge PDF free?

Yes. You can use this tool without registration or payment.

What is the maximum file size?

Each uploaded file can be up to 50 MB.

Are uploaded files stored?

Files are held temporarily for conversion and deleted automatically after processing.

Can I use this on mobile?

Yes. The uploader and download flow work in current mobile and desktop browsers.

How many PDFs can I merge?

You can combine between 2 and 20 PDF files in one operation.

Can I change the order before merging?

Yes. Arrange the selected files in the required order before starting the merge.

Does merging change page quality?

Merging joins existing PDF pages and does not intentionally reduce their visual quality.