Merge PDF

Combining PDFs is one of the most common document tasks — stitching together scanned pages, assembling a report from separate sections, joining invoices for submission. Most tools that do it upload your files to a server, which for documents (contracts, statements, personal records) is exactly what you don't want. This merger runs entirely in your browser: your files are read into memory, combined, and downloaded, never transmitted.

Add two or more PDFs, then arrange them in the order you want — move any file up or down in the list, remove one you added by mistake — before merging. The page count of each file is shown, and the running total, so you know what the combined document will contain. When you're ready, one click merges them in the exact order shown and downloads the result.

The merging is done with pdf-lib, a robust PDF library running in JavaScript, so the output is a proper standards-compliant PDF that opens anywhere. There's no page limit beyond your device's memory, no watermark added, and no signup. Because everything happens locally, it even works offline once the page has loaded — and your documents remain entirely private, which is the whole point of a client-side tool.