PDF Merger

Combine multiple PDFs into one document — private and instant

🔒 Files never leave your browser
📄

Drop PDF files here or click to browse

Select multiple PDF files to merge

How to Use PDF Merger

Upload PDFs

Drag and drop or click to select multiple PDF files you want to merge.

Arrange order

Reorder files using the up/down buttons. The final PDF follows this order.

Merge & download

Click Merge to combine all PDFs into one document and download it instantly.

Why Choose AllTools PDF Merger?

  • ✓ 100% free, no account needed
  • ✓ Files never leave your browser
  • ✓ Merge unlimited PDF files
  • ✓ Reorder files before merging
  • ✓ Preserves original quality
  • ✓ Handles large files
  • ✓ No file size limits
  • ✓ Download instantly

Frequently Asked Questions

Do my PDFs get uploaded? ▼
No. All merging happens in your browser using pdf-lib. Your files never leave your device.
Is there a limit on files? ▼
No limit. Merge as many PDFs as your device memory allows.
Does it preserve formatting? ▼
Yes. Pages are copied exactly as-is including text, images, fonts, and annotations.
Can I reorder pages? ▼
Yes. Use the up/down arrows to arrange files in your preferred order before merging.
Does this work on mobile? ▼
Yes. Works on all devices with a modern browser.

Related Tools

PDF Splitter

Split PDFs by page range, extract pages, or split into individual files

Instant Private

PDF Compressor

Reduce PDF file size instantly — no uploads, no quality loss

Instant Private

Images to PDF

Convert images to PDF with custom page size, margins, and order

Instant Private

PDF to Text

Extract text from any PDF — search, copy, or download as .txt

Instant Private

Image Compressor

Compress images with presets, before/after comparison, and AVIF support

Instant Private

PDF to Markdown

Convert PDFs to Markdown with heading and formatting detection

Instant Private