How many PDFs can I merge at once?

You can merge as many PDF files as you need into a single document.

Can I reorder pages before merging?

Yes. Drag files and pages into the order you want, and rotate any that need it, before merging.

PDFHappy works in any modern browser on Windows, Mac, Linux, and mobile devices — no installation required.

またはPDFファイルをここにドロップ

複数のPDFを1つのPDFに結合。結合前にページの並べ替えや回転も可能—高速・安全・無料。

ファイルはブラウザー内でローカルに処理され、アップロードされることはありません。

対応フォーマット：PDF

Fast Merging, No Signup Required

Drop your PDFs in and get one combined file back in seconds — no account or software to install.

Reorder Before You Merge

Drag your files and pages into the order you want.

Combine Unlimited Files

Merge as many PDFs as you need into a single document.

Works on Any Device

Merge online from Windows, Mac, Linux, or mobile, right from your browser.

はじめからプライベート

ファイルはブラウザー内でローカルに処理され、サーバーにアップロードされることは一切ありません。

100% Free to Use

No sign-up, no hidden fees — merge as many files as you need.

1

Upload your PDFs

Select or drag and drop the PDF files you want to combine.

2

Arrange your files

Reorder and rotate pages so they end up exactly where you want.

3

Merge into one PDF

We combine your files into a single document in seconds.

4

Download your file

Download the merged PDF to your device — done!

Yes. Merging PDFs is completely free, with no limit on the number of files you can combine.