Combine multiple PDF files into one document, free, fast and 100% in your browser.
Drag & drop PDF files here
or
Select 2 or more PDF files · Processed entirely in your browser
PDF Merge combines two or more PDF files into a single document, right inside your browser. Pages are copied exactly as they are with no re-encoding, so quality is preserved perfectly. Because everything runs locally, your files are never uploaded to a server and there are no file-size limits imposed by us, it's completely free.
Merging PDFs is handy whenever separate files need to travel as one. Combine a cover letter and CV, bundle scanned receipts for an expense claim, assemble report sections into a single deliverable, or stitch chapters into one readable ebook. Your files are joined in the order you add them and each page keeps its original sequence, so the finished document reads exactly the way you expect.
Because the whole process runs in your browser with the open-source pdf-lib library, your documents never leave your device and nothing is stored on a server. Pages are copied without re-encoding, so there is no drop in quality and no compression artefacts. It works on Windows, macOS, Linux, Android and iOS in any modern browser, so you can combine PDFs online on your laptop or on your phone without installing an app or creating an account.
Reviewed by the ToolBrainy Team · Files are processed 100% in your browser · Last updated July 2026
Drag & drop or choose two or more PDF files.
Click Merge PDFs to combine them into one.
Save the merged PDF to your device.
Files are merged locally and never uploaded.
Pages are copied exactly, nothing re-encoded.
No queues and no file-size limits from us.
Arrange your files in any order before merging, so the combined PDF flows exactly the way you want.
Join sections into one polished document.
Bundle scanned pages into a single file.
Stitch chapters into one readable PDF.
Group receipts and invoices together.
Merge work samples into one showcase.
Combine forms and attachments to send.
Yes. All PDF merging happens locally in your browser using JavaScript. No file is ever sent to our servers.
There is no hard limit — you can merge as many PDFs as your browser can handle in memory. For very large files, we recommend merging in batches.
No. The merge process copies pages exactly as they are without re-encoding or compressing any content, so quality is preserved perfectly.
If the PDF is encrypted with a password, you will need to unlock it first using our PDF Unlock tool before merging.
That is no problem. Every page keeps its own original size and orientation in the merged file, so an A4 report and a landscape slide deck combine cleanly without being stretched, shrunk or cropped. The result simply follows the sizes of the pages you added.
No. The tool runs entirely in your web browser, so there is nothing to download or install. It works in any modern browser such as Chrome, Firefox, Edge and Safari.
Your files are merged in the order you add them, and every page keeps its original sequence. Add the files in the order you want them to appear in the final document.
Yes. The tool works in mobile browsers, so you can combine PDFs on your phone or tablet the same way you would on a desktop.