Merge PDF files

Add at least two documents and arrange the complete files. The result is built locally and opens in the editor.

Files are processed only in this browser and are never uploaded to a server.

Document order

The list is empty. Add at least two PDF files.

Scope and integrity safeguards

This is a simple whole-document merge mode. Every source is checked before pages are copied; an unsupported structure stops the operation without a partial result.

Ordering works at whole-file level only. Select or remove individual pages later in the editor.
Unsupported sources include encrypted or signed files, forms, attachments, internal navigation, optional layers, tagged PDFs and complex PDF structures.
Sources are not mixed into the currently open document. A new, unsaved PDF is created and handed to the regular editor.

Frequently asked questions

Do the documents leave my device?

No. Inspection, page copying and output generation all happen locally in this browser tab.

Can I change pages after merging?

Yes. The merged result opens in the editor, where you can manage pages and add content. Downloading the finished file follows the current pricing.

What are the limits and restrictions?

Between 2 and 20 files, up to 100 MiB in total and no more than 300 pages. A document with an unsupported structure is rejected instead of being modified unsafely.