Merging and splitting PDF files in the browser

Merging combines several documents into one; splitting does the reverse, extracting pages or ranges into separate files. Both run locally in your browser, which means no upload wait and no copy of your documents on someone else's server.

How to do it

Add the files. Drop one or more PDFs into the workspace, or choose them from your device. Files stay in browser memory.
Set the order. When merging, drag the documents into the sequence you want. Page order in the output follows the order shown on screen.
Choose the operation. For a merge, export a single combined PDF. For a split, select the pages or ranges to extract — you can produce one file per page, or a single file containing a subset.
Export. Download the result. Nothing is queued on a server, so the file is ready immediately.

Why client-side merging matters

Merging is usually the point at which people are handling the most sensitive material they own: signed contracts, bank statements, medical letters, passport scans. A conventional online merger uploads all of it to a server, processes it, and returns it — which means a copy existed outside your control, even if it was deleted afterwards.

Here the merge happens in the browser tab. The documents are not transmitted, so there is no copy to delete and no retention policy to trust. You can confirm it yourself: open your browser's network panel and run a merge. No document-sized request leaves the machine.

Splitting large documents

Splitting is limited by your device's memory rather than by a server quota, because the whole document is held in the tab while it is worked on. A few hundred pages is comfortable on a modern machine; several thousand pages in one file may be slow or fail on a low-memory device.

Page order and rotation

Rotation is applied per page and is preserved through the merge. If a page appears sideways in the output, rotate it before exporting rather than afterwards — the rotation is stored as page metadata, and correcting it later means opening the file again.

What this tool does not do

Stated plainly, because a limitation you discover after trusting the result is worse than one you read first.

Very large documents are bounded by your device's memory, not a server quota.
Encrypted PDFs must be unlocked before they can be merged or split.

Frequently asked questions

How do I merge PDF files without uploading them?

Use a tool that processes in the browser rather than on a server. This site reads the files with JavaScript in your own tab, so the documents never travel over the network. You can verify this in your browser's developer tools: no upload request is made.

Is there a limit on how many PDFs I can merge?

There is no imposed count limit. The practical constraint is your device's memory, since every page is held in the tab at once. Merging a handful of ordinary documents is instant; very large files depend on the machine.

Can I split a PDF into separate pages?

Yes. You can extract individual pages, a contiguous range, or every page as its own file.

Does merging reduce quality?

No. Pages are copied as they are rather than re-rendered, so text stays selectable and images keep their original resolution.

Can I reorder pages while merging?

Yes. The order shown in the workspace is the order written to the output.