📎 PDF 結合
複数のPDFファイルを1つに結合 — 無料、高速、プライベート。
Drop PDF file(s) here
or click to browse
使い方 PDF 結合
ファイルを上のエリアにドラッグ＆ドロップするか、クリックして選択してください。
ボタンをクリックして、ブラウザ内で即座にファイルを処理します。
処理されたファイルは自動的にダウンロードされます。登録不要！
Performance & Details
Merges up to 50+ PDFs in a single session. Average merge time: under 3 seconds for 10 files totaling 20 MB. Uses pdf-lib (open-source) — no server upload, no file size cap beyond browser memory.
All processing uses pdf-lib (open-source). Files stay in your browser — zero server uploads. Last verified: May 2026.
PDF 結合 — 全米で利用可能
PDF 結合 — Available Across Europe
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Go Pro — $5/monthPDF 結合 — Frequently Asked Questions
How many PDFs can I merge at once?▼
There is no limit on the number of files. You can merge 2, 10, or 50+ PDFs in a single session.
Will merging reduce the quality of my PDF?▼
No. Our tool preserves the original quality, fonts, images, and formatting of every page.
Is it safe to merge confidential documents?▼
Absolutely. All processing happens locally in your browser — your files are never uploaded to any server.
Can I merge PDF files on my phone?▼
Yes! The tool works on any smartphone browser. Open the site on your iPhone or Android and merge PDFs on the go.
What if my PDFs have different page sizes?▼
No problem. Our tool handles mixed page sizes and orientations seamlessly in the merged output.