Merge PDF files into one — free and private

How to Merge PDF

1. Add your PDFs. Drag two or more PDF files onto the drop zone, or click it to browse. You can keep adding files after the first batch.
2. Put them in order. Drag the file cards to rearrange them. The combined document follows this order top to bottom, and page counts are shown so you can sanity-check the total.
3. Merge. Click Merge PDFs. Everything is assembled locally, so the time it takes depends on your device rather than an upload queue.
4. Download. Save the combined file. There is no watermark and no page limit on the output.

How to merge PDFs without uploading them

Most free PDF mergers work by uploading your files to a server, combining them there, and giving you a link to download the result. That is fine for a restaurant menu and a bad idea for a signed contract, a payslip, or a scan of your passport. Once a file is uploaded you are trusting a retention policy you cannot verify.

This tool never makes that trade. Your browser reads the files directly off your disk, assembles the combined PDF in memory using WebAssembly, and hands you the result. No request carrying your document is ever made — you can confirm this yourself by opening your browser's developer tools, switching to the Network tab, and merging a file. You will see no upload.

A side effect worth knowing: because there is no server involved, the tool keeps working if your connection drops after the page has loaded.

What merging preserves, and what it does not

Merging copies each source page into a new document, so the visible content, page dimensions, embedded fonts and images all carry over unchanged. Text stays selectable and searchable — pages are not flattened into images.

Some structural extras do not survive a merge, and it is better to know that up front than to discover it later:

• Interactive form fields are copied but may lose their field names if two source files use the same ones. Flatten forms first if the values matter.
• Bookmarks and outlines from the source files are not carried into the combined document.
• Digital signatures are invalidated. This is unavoidable — a signature certifies one exact file, and merging produces a different one.
• Attachments embedded in a source PDF are not transferred.

Common reasons people merge PDFs

The pattern is almost always the same: a process expects one document, and reality produced several.

• Combining twelve monthly bank statements into a single file for a mortgage or visa application.
• Assembling a contract, its annexes and a signature page into one document before sending it out.
• Merging pages you scanned in separate batches because the feeder only takes ten sheets at a time.
• Joining a cover letter, CV and portfolio into one attachment because the job portal allows exactly one upload.
• Collecting receipts into a single expense-report PDF at the end of a month.

Merge PDF vs Organize Pages — which one do you want?

These two tools get confused constantly, and picking the wrong one wastes a few minutes.

Use Merge PDF when you have several separate files and want one file out. It works at the file level: you control the order of the documents, not the order of pages inside them.

Use Organize Pages when you already have one file and the problem is inside it — a page in the wrong place, a blank page to delete, a page that needs rotating. It gives you a thumbnail grid of every page to rearrange directly.

If you need both, merge first and then open the result in Organize Pages. That order means you only do the page-level fiddling once.

Frequently asked questions