How do I merge multiple PDFs into one?

Upload two or more PDF files. Use the ↑↓ buttons to arrange them in the correct order, then click 'Merge PDFs'. The tool combines all pages into a single downloadable PDF file.

Is there a limit on how many PDFs I can merge?

There is no hard limit. For best performance, keep the total combined file size under 100 MB, as very large files may be slow to process in-browser.

Will merging reduce PDF quality?

No. The tool copies pages from each source PDF into the merged document without re-encoding any content. Quality is fully preserved.

Are my PDFs uploaded to a server?

No. Merging happens entirely in your browser using pdf-lib. Your files never leave your device.

Merge PDF

Combine multiple PDF files into one document — free, instant, browser-based.

📄

Drop PDF files here or click to upload

Upload 2 or more PDF files to merge

Ad Placeholder

About Merge PDF

Free online PDF merger. Upload two or more PDF files, reorder them with arrow buttons, and merge them into a single PDF in seconds. Full quality is preserved — pages are copied without re-encoding. Browser-based using pdf-lib — your files never leave your device. No sign-up required.

How to Use Merge PDF

Upload two or more PDF files using the file picker or drag-and-drop.
Use the ↑↓ arrow buttons to set the desired order of the PDFs.
Click Merge PDFs to combine all files into one document.
The merged PDF downloads automatically to your device.

Frequently Asked Questions

How do I merge multiple PDFs into one?: Upload two or more PDF files. Use the ↑↓ buttons to arrange them in the correct order, then click 'Merge PDFs'. The tool combines all pages into a single downloadable PDF file.
Is there a limit on how many PDFs I can merge?: There is no hard limit. For best performance, keep the total combined file size under 100 MB, as very large files may be slow to process in-browser.
Will merging reduce PDF quality?: No. The tool copies pages from each source PDF into the merged document without re-encoding any content. Quality is fully preserved.
Are my PDFs uploaded to a server?: No. Merging happens entirely in your browser using pdf-lib. Your files never leave your device.