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Merge PDF

Combine PDFs (and photos) into one file, in the order you want — on your phone, without uploading.

Also searched as: combine pdf · merge pdf files · pdf joiner

🔒 Your PDF is processed inside your browser and is never uploaded.

How to merge PDF files

  1. Choose two or more PDFs — you can mix in JPG or PNG images; each becomes an A4 page.
  2. Arrange the order with the ↑ ↓ buttons.
  3. Tap Merge PDF and download the single combined file.

Typical uses: joining marksheets, Aadhaar, PAN and certificates into one upload for a college, job or visa portal; combining a scanned form with its annexures; collecting invoices into one monthly file. Pages keep their original quality — nothing is re-compressed, so the merged file is about the sum of the parts. Need it smaller? Run the result through compress PDF to KB.

Password-protected PDFs cannot be merged directly. Remove the password first (you need to know it), then merge.

Related: split PDF, remove pages, JPG to PDF.

Frequently asked questions

Is there a limit on the number or size of PDFs?

No fixed limit — merging runs in your browser's memory, so very large files (hundreds of MB) may be slow on a phone, but a few documents of 5–20 MB are quick.

Does merging reduce the quality?

No. Pages are copied as they are. File size equals roughly the total of the inputs.

Can I merge PDFs with images?

Yes. Add JPG, PNG or WEBP files along with your PDFs; each image is placed on its own A4 page in the order you set.

Are my documents uploaded?

No. The open-source pdf-lib library runs inside your browser; nothing is sent to a server.

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