Docmint

Merge PDF Files Online

Combine multiple PDF documents into a single file. Drag to reorder, then merge.

Files are processed locally — nothing leaves your browser.

🔒Client-side only
⚡Instant
✓Free
100% Private
Processed on your device
Never uploaded

Drop PDF files here, or click to browse

PDF files only • Multiple files supported • Maximum 200MB total

Processed locally — your file never leaves your browser

100% Private
No Uploads
GDPR Ready
Why DocMint

Built for privacy, speed, and simplicity

Unlike other PDF tools, DocMint processes everything in your browser. Your files never touch a server.

100% Private

Your files never leave your computer. Zero servers, zero privacy risk.

Instantly Fast

Browser-first workflows keep common tasks fast, with secure temporary processing only when needed.

Enterprise Ready

GDPR compliant, WCAG accessible, and built with professional-grade security standards.

Complete Your Workflow

Continue with these recommended tools for optimal results

1

Compress PDF

Reduce the size of your merged document

2

Rotate PDF

Fix page orientations after merging

3

Watermark PDF

Add consistent branding across merged pages

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Browse all PDF tools

How to merge PDF files

Follow these simple steps to get professional results in seconds

Upload Multiple PDFs

Select or drag multiple PDF files from your device. You can add as many files as needed.

Our tool accepts unlimited PDF files of any size. Files are processed entirely in your browser, so there are no server-side upload limits.

Pro tip

To select multiple files at once, hold Ctrl (Windows) or Cmd (Mac) while clicking files in the file browser.

Arrange File Order

Drag and drop files in the list to set the exact order for your merged PDF. The first file becomes the first pages.

File order matters! The pages from the first file will appear first in your merged PDF, followed by the second file, and so on. Take time to arrange them properly.

Pro tip

If you have files like 'Chapter 1', 'Chapter 2', etc., make sure they're in the right order before merging.

Merge and Download

Click the merge button to combine all PDFs into a single document. Download your merged file instantly.

The merging process preserves the original quality and formatting of each PDF. Page content, images, and text remain unchanged during the merge.

Pro tip

The merged PDF filename will be based on your first file. You can rename it after downloading if needed.

Why use DocMint to merge PDF files?

Experience the fastest, most private PDF tools online

100% Private

Your files never leave your computer. Zero servers, zero privacy risk.

Clear privacy handling

Browser-first • No retained files • No tracking

Instantly Fast

Browser-first workflows keep common tasks fast, with secure temporary processing only when needed.

Save hours of waiting time

Browser-based processing

Always Free

No subscriptions, no hidden costs. Premium PDF tools that respect your privacy and budget.

Save money on PDF tools

No credit card required

Pro Tips for PDF Merge

Get the most out of your merge PDF files experience

Best Practices

Name your files clearly before uploading (Chapter1.pdf, Chapter2.pdf, etc.). This makes it easier to arrange them in the correct order for merging.

File Organization

If merging many files, consider organizing them in a folder first. You can select all files at once by holding Ctrl/Cmd while clicking.

Large Files

For very large files (100MB+), close other browser tabs to free up memory. This helps ensure smooth processing and prevents browser slowdowns.

Quality Check

After merging, quickly scroll through your merged PDF to verify all pages are included and in the correct order before saving or sharing.

Learn More About PDF Merge

PDF Page Management

Learn how to control page order and organize documents effectively

Working with Large PDF Collections

Best practices for merging many PDFs efficiently

PDF File Organization

How to name and organize PDFs before merging for best results

Preserving PDF Quality During Merge

Understanding what happens to your PDFs during the merge process

Alternatives to PDF Merging

When to merge vs. when to use other PDF organization methods

Batch PDF Processing

Strategies for handling multiple PDF operations efficiently

Frequently Asked Questions - PDF Merge

Everything you need to know about how to merge PDF files online

Getting Started

Basic questions about merging PDFs

How many PDFs can I merge at once?

There's no limit on the number of PDF files you can merge. You can combine 2, 10, 50, or even more PDFs into a single document. The only practical limit is your device's memory.

Can I control the order of pages in the merged PDF?

Absolutely! You can drag and drop files in the list to set the exact order. The first file in your list becomes the first pages of the merged PDF, followed by the second file, and so on.

What happens to the file size when I merge PDFs?

The merged PDF will be roughly the combined size of all input files. If you merge a 2MB and 3MB PDF, expect a result around 5MB. No additional compression is applied during merging.

Privacy & Security

Your data protection questions answered

Are my PDF files secure during merging?

Yes — all PDF files are processed entirely in your browser using JavaScript. No files are uploaded to any server. Your documents never leave your device.

Do you store my merged PDF files?

No, we don't store any files. The merging process happens in your browser's memory. When you close the tab or refresh the page, everything is cleared automatically.

Can you see the content of my PDFs?

No, we cannot see your PDF content. All processing happens locally on your device using client-side JavaScript. We never have access to your documents.

Technical Details

In-depth technical information

Will bookmarks and links be preserved?

The merged PDF preserves the page content from each file. However, interactive elements like bookmarks, form fields, and internal links may not carry over between documents as they reference specific page structures.

What if some PDFs are password-protected?

Password-protected or encrypted PDFs cannot be merged until they're unlocked. Use our Unlock PDF tool first to remove password protection, then return here to merge them.

Are there file size limits?

Files are processed in your browser, so there's no server upload limit. However, very large files (200MB+ per file) may be slow to process and could cause memory issues on older devices.

Still have questions?

Can't find what you're looking for? All our tools work entirely in your browser with complete privacy.

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