PDF Merger

Combine multiple PDFs into one document right in your browser. Reorder your files, merge, and download.

Drop PDFs here or click to upload

PDF only, 2 or more files

Max 60MB per file, 200MB total. Your PDFs never leave this browser.

PDF files

How to Merge PDFs

  1. Click the upload area, or drag and drop two or more PDFs onto it.
  2. Wait for each file's page count to appear, then reorder them by dragging or with the up/down buttons.
  3. Click "Merge PDFs" to combine them into one document.
  4. Click "Download merged PDF" to save the result.

Benefits

  • Combine reports, scans or chapters into a single file.
  • No installation and no account required.
  • Runs entirely in your browser using pdf-lib — your files are never uploaded to a server.

Features

  • Drag-and-drop multi-file upload with a mobile-friendly file picker.
  • Per-file page count and file size.
  • Reorder files by dragging or with up/down controls.
  • Remove individual files or clear all and start over.
  • Friendly error messages for corrupt or password-protected PDFs.

Privacy & Security

This tool merges your PDFs using the open-source pdf-lib library, running entirely on your device. Your files are never uploaded to a Napizo server. Read the full Privacy Policy for details.

Frequently Asked Questions

You can add as many PDFs as you like, up to a combined 200MB, and arrange them in any order before merging.

Yes — pages are copied in the exact order your files are listed, top to bottom.

That file will be flagged as unreadable and skipped. Remove the password and re-upload it to include it in the merge.

Yes, each PDF is limited to 60MB, with a 200MB combined limit.

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