Merge PDFs

Merge multiple PDFs into a single document, in the chosen order, with a source pages → final pages mapping. Everything is done locally in your browser.

Select PDFs

Add multiple PDFs, reorder, then start the merge.

No upload: your files stay on your device.

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Use case

Assemble a folderCombine contracts, appendices, supporting documents, or reports into a single PDF ready to be sent.
Automate a generationMerge job outputs (invoices, receipts, reports) in a server pipeline.
Prepare for printingCreate a final document with the exact order of pages, without manual manipulation.
Unify heterogeneous sourcesMerge PDFs from scanners, office exports, or business tools.

What you get

A downloadable merged PDF, in the provided order.

A summary (mapping) of source pages → final pages to facilitate traceability and debugging.

Limitations and points of attention

Merging very large PDFs can consume a lot of memory/CPU depending on the environment.
Forms, bookmarks, and metadata can be merged or simplified depending on the tool's capabilities.
Existing signatures may become invalid after merging (the signed document must remain unchanged).

Frequently asked questions

Does the merge keep the bookmarks?

Often yes, but it depends on the source PDFs and the engine. Check the table of contents after merging.

Can I merge protected PDFs?

If the PDF is encrypted, it usually needs to be unlocked (password) before merging.

Does the quality of the pages change?

No: merging assembles the pages, it does not recompress the content by default.

Tip

Before an "official" merge, consider cleaning/sanitizing each source PDF: you avoid carrying over unwanted metadata or elements into the final document.