Merge multiple PDF files into a single file - Process directly in the browser
Click or drag and drop the PDF file here
Select multiple files at once
📌 Sort file order using the ▲▼ button
📌 Files will be merged in order from top to bottom
📌 Processed entirely in the browser, not uploaded to the server
Free online PDF merging tool. Merge multiple PDF files into a single file. Sort files before merging using the ▲▼ button. Processed entirely in the browser using pdf-lib, no uploading to the server, absolute security for sensitive documents. Maintain quality, formatting, links, bookmarks. Unlimited number of files. Download results instantly.
Merge PDFs is a common need in office work: Filing - many documents need to be mergedwall 1 file to upload. Send email - attach 1 fileinstead of many files. Printing - printing 1 file is easier than many files. Storing - managing 1 file is easier than many files. Sharing - sending 1 linkinstead of many links. This tool processes COMPLETELY on the browser belonging to you with JavaScript andpdf-lib. PDF files are NOT uploaded to any server This is especially important with sensitive documents: copper contracts, financial statements, personal records. You can verify by opening the Network tab in DevTools - There are no requests to send files.
There is no hard limit on the number of files. However, because processing is done in the browser, it depends on your computer's RAM. With total capacity < 100MB, works well on most devices. Larger files may be slow or experience memory errors.
ARE NOT. The tool uses pdf-lib to COPY pages intact from the original file. No compression, no re-encoding. Text, images, vectors, fonts, links, bookmarks are all kept 100% intact. The output file has the same quality as the original file.
NOT directly. Password-protected (encrypted) PDF files need to be unlocked first. You can: Open the file in Adobe Reader, enter password, save as passwordless version. Or use the online PDF unlock tool. Only then can it be combined.
ARE NOT. All processing happens 100% in your browser using JavaScript and pdf-lib library. The file is not sent anywhere. You can verify: Open DevTools (F12) > Network tab > Perform merge > No requests contain PDF files.
HAVE. pdf-lib copies entire page content including internal links, external links, and annotations. However, bookmarks (outlines) from individual files may not be merged perfectly - this is a limitation of PDF merging in general.
This tool only merges PDF files with PDF. If you want to add images to PDF, use the 'Convert Images to PDF' tool to convert images to PDF first, then combine the PDF files.
Almost equal or slightly smaller. pdf-lib can optimize some redundant data when merging. However, there is no lossy compression so quality is not affected.
HAVE. The tool works on all modern browsers, including mobile browsers (Chrome, Safari on iOS/Android). However, with large files, the computer will process faster due to more RAM.
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