Merge PDF Files Online
Merge several PDF files into one online, in the order you choose. Free and entirely in your browser, no upload and nothing leaves your device.
Drop PDF files here
What this tool does
Add the PDFs you want to join, drag them into the right order, and get a single combined file. PDF Merge runs in your browser with pdf-lib, so your documents are never uploaded. Reorder or remove files until the sequence is exactly what you need.
Need to take a PDF apart instead? Pull out pages with PDF split, or shrink images first with Image compress.
What you can use it for
- Join scanned pages that came as separate files.
- Combine a cover, a body and an appendix into one document.
- Merge invoices or reports into a single file to send.
- Assemble a booklet from individual PDF sections.
How to use it
- Drop or choose two or more PDF files.
- Reorder them with the up and down arrows.
- Remove any file you do not want.
- Merge and download the combined PDF.
Everything runs inside your browser. No file is uploaded to any server. See more tools in this field.
Pairs well with
Other tools people reach for in the same flow.
- Split PDF: Extract Pages
extract pages from a PDF
Usually paired in the same flow.
- PDF to Images (PNG, JPG)
export PDF pages as images
Usually paired in the same flow.
- Image Converter: PNG, JPG, WebP
convert images between PNG, JPG and WEBP
Useful right after converting.
- Compress Image (JPG, PNG, WebP)
compress your images
Useful right after converting.
Related tools
DocumentSplit PDF: Extract Pages
Split a PDF and extract specific pages into a new file online. Free and entirely in your browser, no upload and nothing leaves your device.
PDF to Images (PNG, JPG)
Convert each page of a PDF into a PNG or JPG image online. Free and entirely in your browser, no upload and nothing leaves your device.
Image Converter: PNG, JPG, WebP
Convert images between PNG, JPG and WebP online, in either direction. Fast, free and entirely in your browser, no upload needed.
Compress Image (JPG, PNG, WebP)
Compress JPG, PNG and WebP images online to reduce file size without losing visible quality. Free, fast and in your browser, no upload.
Frequently asked questions
Are my PDFs uploaded anywhere?
No. The files are read and combined entirely in your browser with pdf-lib. Nothing is uploaded, so confidential documents stay on your device.
Can I control the page order?
Yes. The files merge in the order shown in the list, top to bottom. Use the arrows to reorder them before merging, and the result follows that exact sequence.
Is there a limit on the number of files?
There is no fixed limit, but everything runs in browser memory, so very large or very many files can get slow. For everyday documents it is instant.
What if one of the files is not a valid PDF?
The merge stops and flags the problem so you can remove the offending file. A password-protected or corrupted PDF may fail to open; remove the protection first and try again.