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合并PDF
合并为一个文件

几秒内将多个PDF文件合并为一个文档。拖放文件、调整顺序并下载合并结果。

最多20个文件
一次合并最多20个PDF
100%
私密且安全

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最大50MB的PDF文件

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强大的PDF合并功能

轻松精确地合并您的文档

拖放操作

只需拖放PDF文件即可合并

调整顺序

合并前可按任意顺序排列文件

快速处理

利用高效引擎在几秒内合并PDF

无质量损失

合并后的PDF保持完整的原始质量

最多20个文件

一次合并最多20个PDF文档

隐私优先

文件在处理后自动删除

如何使用

1

上传文件

选择或拖放多个PDF文件

2

调整顺序

根据需要调整文件顺序

3

下载

立即获取合并后的PDF

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.