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Your files never leave your device. Built for developers who value privacy.

  1. Toolkernel
  2. /
  3. PDF Tools
  4. /
  5. Merge

Merge PDF Files Online

Combine multiple PDF documents into a single file

Your files never leave your device

Drop PDF files here

or click to browse your computer

Choose Files
Max 50MB per fileUp to 20 files

How to Merge PDF Files

  1. 1
    Upload Your PDFs
    Drag and drop multiple PDF files or click to browse. You can select up to 20 files at once.
  2. 2
    Arrange the Order
    Drag files to reorder them. The final merged PDF will follow this sequence.
  3. 3
    Merge & Download
    Click "Merge PDFs" to combine. Download starts automatically when complete.

Why Merge PDF Files?

Combining multiple PDF documents into a single file streamlines document management and makes sharing easier. Instead of sending multiple attachments, you can share one comprehensive document that's easier for recipients to handle.

Merged PDFs also preserve the logical flow of related content. Whether you're compiling a report with appendices, creating a portfolio, or assembling legal documents with signatures, a single file keeps everything organized and in the correct order.

For archival purposes, merged PDFs reduce file clutter and make it easier to search and reference related documents. Many document management systems and e-filing platforms also work better with consolidated files.

Common Use Cases

Business Reports

Combine quarterly reports, appendices, and cover pages into a single professional document.

Legal Documents

Merge contracts, addendums, and signature pages while keeping confidential content private.

Academic Papers

Combine research papers, citations, and supplementary materials for submission.

Invoices & Receipts

Consolidate multiple invoices or receipts into one PDF for bookkeeping.

Presentations

Merge slide decks from different sources into a unified presentation.

Scanned Documents

Combine multiple scanned pages into a single organized document.

Frequently Asked Questions

How many PDF files can I merge at once?

You can merge up to 20 PDF files in a single operation. If you need to combine more, simply merge the output with additional files in another batch.

Is there a file size limit?

We recommend files up to 50MB each for optimal performance. Since processing happens in your browser, larger files depend on your device's available memory.

Will merging affect the quality of my PDFs?

No. Our tool preserves the original quality of all pages. We combine PDFs at the structural level without any re-compression or quality loss.

Are my files uploaded to a server?

No. All processing happens 100% in your browser. Your files never leave your device, making this safe for confidential and sensitive documents.

Can I merge password-protected PDFs?

Currently, you'll need to remove password protection before merging. We recommend using the original software that created the PDF to remove protection first.

Related PDF Tools

Split PDF

Extract specific pages from a PDF

Compress PDF

Reduce file size after merging

Organize Pages

Reorder, rotate, delete pages