🖼️ 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.
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.