PDF結合
複数のPDFファイルを一つに結合。高速・無料・ブラウザ内で完全処理。
関連キーワード
How to Use PDF Merger
Combining multiple PDF files into one cohesive document is a common task for professionals, students, and businesses alike. You might need to merge separate invoice pages, combine chapter drafts into a manuscript, join scanned document pages, or consolidate multiple reports into a single file for easy distribution. Our PDF Merger tool handles all of this entirely within your web browser using the pdf-lib JavaScript library — meaning your files are never uploaded to any server, ensuring complete privacy and security. There are no file size limits imposed by a backend, and the merge operation preserves all original text, images, fonts, and formatting from each source PDF. You can add as many PDFs as needed, reorder them with the arrow buttons, and remove any file you accidentally added before merging. The resulting combined PDF is downloaded directly to your device.
- 1
Add your PDF files
Click the upload area to select multiple PDF files. You can also add them one at a time.
- 2
Reorder if needed
Use the ▲ and ▼ arrow buttons next to each file to arrange them in the correct order.
- 3
Merge and download
Click the Merge button. The combined PDF will be automatically downloaded to your device.
Frequently Asked Questions
Is there a limit to how many PDFs I can merge?
There is no strict limit. You can merge as many PDFs as your browser can hold in memory. For very large collections of files, processing may take a few seconds.
Are my files uploaded to a server?
No. All merging is done locally in your browser using JavaScript. Your files never leave your device, ensuring complete privacy.
Will the merge reduce image or text quality in my PDFs?
No. The tool copies pages directly between PDF documents without re-encoding content, so quality is fully preserved.