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PDF Merger

Combine multiple PDF files into one. Drag to reorder files, then merge. 100% client-side — your files never leave your browser.

Drop PDF files here

Or click to browse — you can select multiple files at once

PDF files only · Processed entirely in your browser

How to Use

Upload PDF files — drag and drop one or more PDF files onto the upload area, or click to open the file browser. You can select multiple files at once.

Reorder if needed — drag files up or down in the list to set the order they appear in the merged output. The merged PDF pages follow this order top-to-bottom.

Remove unwanted files — click the ✕ button on any row to remove that file from the merge. You can also add more files at any time.

Click Merge PDFs — the tool combines all files in the listed order and downloads the result as a single PDF to your device.

FAQ

Is there a file size or page count limit? ▾

There is no hard limit — the tool is constrained only by your device's available memory. Very large PDFs (100+ pages at high resolution) may take a few seconds. As a practical guide, PDFs under 50 MB each work smoothly on most devices.

Are my PDF files uploaded to a server? ▾

No. All processing happens entirely in your browser using the pdf-lib JavaScript library. Your files are never sent to any server. This means the tool works offline once the page is loaded.

Can I merge password-protected PDFs? ▾

Password-protected PDFs cannot be merged — the tool will show an error for that file. You would need to remove the password using another tool first, then upload the unlocked file here.

Will the merged PDF keep the original quality? ▾

Yes. The tool copies pages at their original resolution and quality — no compression or re-rendering happens. Images, fonts, and vector content are preserved exactly as in the source files.