Join several PDF files into one. Upload two or more PDFs in the order you want, and download a single merged PDF. Everything happens in your browser — your files are never uploaded anywhere.
Your files are processed on your own device and never leave it. The merged PDF keeps the pages in the order you selected them.
1. Click Choose Files and select two or more PDF files. 2. Check the list is in the order you want. 3. Click Merge PDFs & Download to save the single merged PDF.
PDF files often arrive in pieces: a scanned document split into separate files, a report with chapters saved separately, or a job application with a resume, a cover letter and certificates as three different PDFs. Sending them one by one is messy, and some forms only accept a single file. This free PDF merger joins them into one clean PDF in seconds. Choose two or more PDF files, and the tool combines them in the order you selected, keeping every page. There is no sign-up, no watermark and no page limit, and because the merge happens in your browser, your private documents are never uploaded to any server.
The tool uses pdf-lib, a free library that reads and writes PDFs right in your browser. It copies every page from each file, in order, into a new PDF, so the text, images and layout of your original files are preserved. A merged PDF is easier to email, easier to upload to a form, and easier to store, because one file replaces many.
Suppose you are applying for a job and the form asks for one PDF file, but you have three: resume.pdf, cover-letter.pdf and certificates.pdf. Select all three files in that order — resume first, then cover letter, then certificates — and click Merge PDFs & Download. You get a single file called merged.pdf that starts with your resume, continues with your cover letter, and ends with your certificates. Upload that one file to the form, and the employer sees your whole application in the right order.
Now take a scanned book saved as three separate PDFs: part1.pdf (20 pages), part2.pdf (25 pages) and part3.pdf (15 pages). Select all three in order and merge them, and you get one PDF with 60 pages: pages 1 to 20 from part 1, pages 21 to 45 from part 2, and pages 46 to 60 from part 3. The page numbers inside the book stay as they were, and the whole book is now one file that is easy to search, share and store. Try it with any set of PDFs on your computer and check that the merged file has the right number of pages.
A PDF is a collection of pages, and merging simply means copying the pages from several files into one new file, in order. The pdf-lib library opens each of your PDFs, reads its pages, and copies them into a fresh PDF document, one after another. The text, fonts, images and layout of each page are copied exactly, so the merged PDF looks just like the originals. The order matters: the first file you select becomes the first pages, the second file becomes the next pages, and so on. The tool does not change your original files at all — it only reads them and creates a new one.
Select files in the right order. The merged PDF follows your selection order, so pick the first file first. Check the file list. The tool shows every file you selected, so confirm the order before you merge. Merge in small groups for big files. Very large PDFs can be slow on an old device, so merge a few at a time if needed. Combine with JPG to PDF. Turn photos into a PDF first with our JPG to PDF Converter, then merge that PDF with others here. Rename the merged file. The download is called merged.pdf — rename it to something clear, like Job-Application.pdf.
Selecting files in the wrong order. The merge follows your selection order, so check the list first. Choosing only one file. Merging needs at least two PDFs; with one file, there is nothing to join. Using a password-protected PDF. Locked PDFs cannot be merged until the password is removed. Expecting the file to shrink. Merging joins files together; it does not compress them, so the result is about as big as all the files added together. No internet on first load. The tool downloads the free pdf-lib library when the page loads, so you need the internet the first time; your files themselves are never uploaded.
Pro Tip: If your merged PDF is too big to email, use our PDF Compressor next — it re-saves the file and can make it smaller, especially for text-heavy PDFs.
Note: This tool needs the internet the first time it loads, because it downloads the free pdf-lib library. After that, your files are processed on your device and never uploaded anywhere.
How do I merge PDF files? Select two or more PDF files, check the order in the list, and click Merge PDFs & Download. The tool joins them into one PDF and saves it to your device.
Can I merge more than two PDFs? Yes. You can merge as many PDF files as you like in one go. Just select them all, and they are joined in the order you selected them.
Are my PDFs uploaded anywhere? No. The merge happens entirely in your browser using the pdf-lib library. Your files never leave your device.
Will the merged PDF keep the original layout? Yes. The text, images, fonts and layout of every page are copied exactly into the new PDF.
Can I change the order of the pages? The pages follow the order you selected the files. To change the order, select the files again in the order you want them.
Can I merge a password-protected PDF? No. Locked PDFs cannot be opened by the tool. Remove the password first, then merge the file.
Will merging make my PDF smaller? No. Merging joins files together, so the result is about as big as all the files added together. Use our PDF Compressor if you need a smaller file.
Is there a page limit? No. There is no page limit in this tool, but very large files can be slow on older devices, so merge in smaller groups if needed.