🖼️ Image & File

Merge PDF

Upload multiple PDF files, drag to reorder them, and download a single combined PDF — all in your browser.

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Click to upload or drag & drop PDF files

PDF files only — multiple files supported

How it works

Upload the PDF files you want to combine. Drag the rows to reorder them — the final PDF will follow that order. Click Merge & Download to combine them and save the result. All processing uses pdf-lib and happens entirely in your browser — no files are uploaded to any server.

Why Merge PDFs?

Receiving a report split across three separate PDFs, or needing to combine a cover letter with a CV and certificates, is an everyday workflow problem. Sending multiple files creates confusion about document order and risks the recipient missing one. Merging all files into a single PDF ensures they arrive together in the exact sequence you intend. This tool does the merging directly in your browser without uploading anything to a server, which is especially important when the documents are confidential — payslips, contracts, ID documents, or legal records.

Key Features

  • Drag to reorder: Drag file rows up and down to set the final page order before merging
  • Multiple files at once: Upload as many PDFs as you need — no hard limit
  • Full content preservation: Text, fonts, images, vector graphics, and annotations are copied byte-for-byte
  • Privacy-first: Uses pdf-lib in your browser — your documents never leave your device
  • File size display: Each file shows its size so you can gauge the final PDF size before merging

Real-Life Use Cases

  • Combining a cover letter, resume, and portfolio into a single PDF before submitting a job application
  • Merging monthly bank statements into one annual PDF for tax filing or financial review
  • Combining a signed contract with its annexures and exhibits into one document for record-keeping
  • Merging separate chapter PDFs of a report or thesis into one complete submission document
  • Combining invoices from multiple vendors into one PDF for easier approval and payment processing

Who Can Use This Tool

Students, office professionals, HR teams, legal and finance departments, freelancers, and anyone who regularly works with PDF documents. It is especially useful for people who need to combine documents quickly without access to Adobe Acrobat or other paid PDF software.

Tips & Best Practices

  • Drag to reorder files before merging — the final PDF will follow exactly the order shown in the list
  • If a password-protected PDF causes an error, unlock it first using the Unlock PDF tool, then merge
  • For very large files (over 50 MB total), consider compressing each PDF first using Compress PDF to reduce the merged output size
  • Name your files descriptively before uploading (e.g., "01-cover.pdf", "02-resume.pdf") to stay organised
  • After merging, verify the output PDF on your device before sharing to confirm page order and content are correct

Frequently Asked Questions

How many PDF files can I merge at once?
There is no hard limit on the number of files. You can merge as many PDFs as you like. However, very large files or a very large number of pages may be slow to process, since all merging happens inside your browser. For best performance, keep total file size under 100 MB.
Are my PDF files uploaded to a server?
No. This tool uses pdf-lib, a JavaScript library that runs entirely in your browser. Your PDF files are never uploaded to any server — they are processed locally on your device, so your documents remain completely private.
Can I merge password-protected PDFs?
Password-protected (encrypted) PDFs cannot be merged without the password. If you try to merge an encrypted PDF, the tool will show an error. You will need to remove the password protection first using the original PDF application (e.g. Adobe Acrobat) before merging.
How do I reorder pages before merging?
Drag the file rows up or down to set the order. The final PDF will contain the pages in the order the files appear in the list, with all pages from each file included. To reorder individual pages within a single PDF, you would need a desktop application like Adobe Acrobat or PDF24.
Will the merged PDF preserve the original formatting and fonts?
Yes. The tool copies the pages byte-for-byte from each source PDF into the merged document. All text, images, fonts, vector graphics, and annotations are preserved exactly as in the original files.
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