Merge PDF

Merging PDFs is one of the most common document tasks — combining scanned receipts into one expense report, stitching together chapters of a book, assembling a set of signed contract pages, or joining multiple invoices into a single file for archiving. Most online PDF mergers require uploading your files to a remote server, which means your documents — often containing sensitive financial, legal, or personal information — pass through infrastructure you don't control before you get a result back.

This tool merges PDFs entirely inside your browser using WebAssembly-backed PDF parsing. Your files are read directly from disk into memory, combined page-by-page, and handed back to you as a new file — at no point does any byte of any PDF leave your device. There's no upload progress bar because there's no upload.

Add as many PDF files as you need, then drag to reorder them into the exact sequence you want the final document to follow. Each file in the list shows its page count and size so you can confirm you've picked the right version before merging. Once you're happy with the order, click Merge to generate the combined PDF and download it immediately.

This approach also means there's no file-size cap tied to a server upload limit, no waiting on a queue, and no risk of a document sitting in a third-party company's storage after you're done with it. Whether you're a paralegal assembling exhibits, a student combining lecture-note PDFs, or anyone who just needs two PDFs to become one, this tool gets it done privately and instantly.