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Guide1 min readUpdated June 29, 2026

How to merge PDF files

Short answer

To merge PDFs, add the files in the order you want, arrange them, and export a single combined document. Doing it in the browser keeps the files on your device instead of uploading them to a server.

Order is everything

Merging simply concatenates documents, so the order you add and arrange them is the order of the final file. Set the sequence before exporting rather than fixing it afterward.

  1. Add your PDFsSelect or drop in every file you want to combine.
  2. Arrange the orderReorder the documents so they flow correctly in the final PDF.
  3. Merge and downloadExport the combined file and save it locally.
Try it: Merge PDFCombine PDFs in your browser. The files are not uploaded to a server.Open tool
Why local merging mattersPDFs often contain contracts, IDs, or financial details. Merging locally means those documents never leave your device.

Before you share the result

A merged PDF can still carry metadata from each source file. If you plan to share it, check and clear that. See What metadata is hidden in a PDF?.

References

Questions

Does merging reduce the file size?

Not by itself. Merging combines the pages; the total size is roughly the sum of the inputs. Compress the images or the PDF separately if size matters.

Can I merge images into a PDF too?

Yes, but that is a slightly different task: converting images into PDF pages first. A dedicated images-to-PDF tool handles that.

Are my PDFs uploaded when merging?

No. The merge happens locally in your browser tab and the files are never uploaded.

Keep reading

Guide1 min readHow to split a PDFSplitting a PDF lets you pull out pages or break a long document into parts. Here is how to choose ranges and keep it local.Read
Explainer1 min readWhat metadata is hidden in a PDF?PDFs carry hidden metadata: author, software, timestamps, and sometimes more. Here is what is in there and how to check and remove it before sharing.Read