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PDF結合
ファイルを1つに

複数のPDFファイルを数秒で1つのドキュメントに結合します。ファイルをドラッグ＆ドロップして並べ替え、結合結果をダウンロードしてください。

最大20ファイル
一度に最大20個のPDFを結合
100%
プライベート＆セキュア

またはクリックして参照

最大50MBのPDFファイル

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強力なPDF結合

ドキュメントを簡単かつ正確に結合

ドラッグ＆ドロップ

PDFファイルをドラッグ＆ドロップするだけで結合

ページの並べ替え

結合前にファイルを任意の順序に配置

高速処理

効率的なエンジンで数秒でPDFを結合

品質劣化なし

結合後もオリジナルの品質を完全に維持

最大20ファイル

一度に最大20個のPDFドキュメントを結合

プライバシー優先

処理後にファイルは自動的に削除されます

使い方

1

ファイルをアップロード

複数のPDFファイルを選択またはドラッグ

2

順序を整理

必要に応じてファイルを並べ替え

3

ダウンロード

結合済みPDFをすぐに取得

Why Use PDFCheck to Merge PDF Files?

PDFCheck's online PDF merger is designed for speed, privacy, and ease of use. Whether you're combining invoices, merging chapters of a report, or assembling a portfolio, our tool handles it effortlessly. Unlike other PDF tools, we never add watermarks, require subscriptions, or limit your usage with hidden paywalls.

Common Use Cases for Merging PDFs

Business Reports

Combine quarterly reports, financial statements, and executive summaries into a single professional document for stakeholders.

Academic Papers

Merge research papers, appendices, cover pages, and reference lists into one cohesive submission.

Legal Documents

Assemble contracts, amendments, signatures, and supporting exhibits into a complete legal package.

Job Applications

Combine your resume, cover letter, references, and certificates into a single file for easy submission.

Frequently Asked Questions

Is the PDF merge tool free?
Yes, PDFCheck's PDF merger is completely free to use with no hidden costs, no watermarks, and no registration required. You can merge up to 20 PDF files per session.
How many PDF files can I merge at once?
You can merge up to 20 PDF files at once. Each individual file can be up to 50 MB in size, giving you plenty of flexibility for combining documents.
Does merging affect PDF quality?
No. PDFCheck merges your PDFs without re-encoding or compressing them, so the original quality, fonts, images, vector graphics, and formatting are fully preserved in the output file.
Are my files safe and private?
Absolutely. All uploaded files are processed on our secure servers and automatically deleted after your session ends. We never store, share, or access your documents. No data is sent to third parties.
Can I reorder pages before merging?
Yes. You can drag and drop files to rearrange their order before merging. The merged PDF will follow the exact sequence you set. This makes it easy to organize multi-document reports.
What types of PDFs can be merged?
You can merge any standard PDF files — scanned documents, text-based PDFs, forms, reports, invoices, contracts, and more. Password-protected PDFs must be unlocked before merging.
Do I need to create an account to merge PDFs?
No account or registration is needed. Simply upload your PDF files, arrange them in order, and click Merge. Your combined PDF is ready in seconds.