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PDF Merger

Merge multiple PDF files into a single downloadable document in their selected order.

Document settings

Files stay on your device. Nothing is uploaded.

Up to 500 pages. Keep originals: editing can invalidate digital signatures.

Output PDFPreview
Your preview will appear here
Output PDF

How pdf merger works

Pages are copied from each selected PDF into a new document, retaining their page dimensions.

How to use this tool

  1. Select a supported file from your device.
  2. Adjust the settings and review the updated preview.
  3. Review the output and file details, then download the processed file.

Worked example

Combine a two-page PDF and a three-page PDF to create one five-page document.

Accuracy and limits

Encrypted PDFs are unsupported. The combined output is limited to 500 pages. Keep signed originals separately.

File privacy and supported formats

Files are processed on this device and are not uploaded. File signatures are checked before processing. Use files up to 20 MB each. PDF batches accept up to 20 files and 50 MB in total, with a 500-page output limit. Images are limited to 24 megapixels and 10,000 pixels per side.

Invalid, encrypted or unsupported files produce an error. Keep the original copy, especially for digitally signed documents. Processing is not a malware scan and does not certify a file as safe.

Frequently asked questions

How does pdf merger work?

Pages are copied from each selected PDF into a new document, retaining their page dimensions.

What should I check before using the result?

Encrypted PDFs are unsupported. The combined output is limited to 500 pages. Keep signed originals separately.

Is PDF Merger free to use?

Yes. PDF Merger is free, browser-based, and does not require signup.

Does this tool save my data?

Tool inputs are processed on your device. File tools do not upload your files. Website analytics are described in the privacy policy.

Can I use it on mobile?

Yes. The page is responsive and works on modern mobile, tablet, and desktop browsers.

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Reviewed 2026-10-24. By Mahad and Mehdi Developers.