Fusionner des PDF

Merge PDF: one document instead of a pile of attachments

A report split across five files, a contract with an annex that arrived separately, a set of invoices from the same month — sending them one by one invites confusion. Someone opens the wrong file first, a page goes missing in the thread, or a recipient replies to an outdated version. Merge PDF solves that by joining several PDF files into a single document, in the order you choose, so the whole set travels as one coherent file.

The tool is deliberately simple: it stitches complete PDFs together, page by page, without retyping anything or rebuilding the layout. Page sizes and content stay as they were in the originals, and the merged file opens in any PDF reader exactly like a normal document.

How to merge PDFs

1. Open Fusionner des PDF and add your files — drag them in or pick them from your device, in any order.
2. Arrange the list so it reads the way you want the final document to read: drag a file up or down until the sequence is right. Double-check the first and last files, since those are the ones people notice first.
3. Click merge and wait a moment while the pages are joined.
4. Download the single combined PDF, open it, and skim the page boundaries to confirm nothing is out of order before you send it on.

When to use it — and when not to

Use it when you are assembling a submission, a chapter set, monthly statements, or scanned pages that belong in one file. Skip it when the files need different handling — for example, one needs pages removed or rotated first, or one is password-protected and must be unlocked before it can be combined. Do those jobs first, then merge.

Frequently asked questions

Does merging change my PDFs' content or quality?

No. Merging only reorders and joins the existing pages; text, images, and page dimensions carry over unchanged. If a source page looks blurry, the merged copy will look the same — merging is not a repair or enhancement step.

Can I reorder files after adding them?

Yes, and you should. The order in the list becomes the order of pages in the result, so arrange files before you merge rather than fixing the sequence afterwards.

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

There is no fixed count, but very large batches — dozens of long documents — take longer and use more device memory. For a huge archive, merge in smaller groups and then merge those groups.

Are my documents uploaded anywhere?

Never. Everything runs locally in your browser, so your PDFs stay on your own device from start to finish — particularly important when the documents are contracts, financial records, or anything confidential.

Want the full walkthrough? See the Merge PDF guide. Related tools: Diviser un PDF, Compresser un PDF, Organiser / supprimer des pages.