Merge PDF Files

Scanned pages saved as separate files, a contract split into chapters, several invoices for one report — sooner or later everyone needs to merge PDF files into a single document. Most online mergers make you upload private paperwork to someone else's server; this tool does the same job without your files ever leaving the computer.

Add two or more PDFs by drag & drop or through the file picker, then arrange them: every file in the list has up/down buttons and a remove button, so you can fix the order without re-selecting anything. When you press the button, the tool copies every page of every document — in exactly the order shown — into one new PDF and hands it back as a download.

The merging is done by the pdf-lib engine running inside your browser, so pages keep their original size, orientation, fonts and graphics; nothing is rasterized or recompressed. Because there is no server, there is nothing to queue for, no file-size caps imposed by a hosting plan, and no watermark stamped on the result.

The tool is handy for freelancers assembling deliverables, students combining lecture scans, accountants packaging receipts, and anyone who needs to send one tidy attachment instead of five. It works offline once the page has loaded — useful for confidential contracts, medical records and other documents you would rather not upload anywhere.