Smart PDF Merge Tool – Free PDF Layout

PDF File Manager

Drag and drop invoices here

or click the button below to add files

Supports PDF, PNG, JPG, WEBP, BMP, TIF

Layout Preview

Waiting for uploads

Add invoices to preview the layout instantly

PDF合并工具的主要功能

体验下一代 PDF 处理工具——强大、免费且注重隐私。

100% Local Processing

All files are processed locally in your browser. Never uploaded to any server, ensuring complete privacy and data security.

Smart A4 Layout

Automatically arrange invoices and receipts on A4 pages. Save paper and printing costs, designed for accounting and reimbursement.

Fast Batch Processing

Merge dozens of PDF and image files simultaneously. Real-time preview with one-click professional document generation.

Intelligent Error Detection

Auto-detect encrypted PDFs and permission-restricted files. Clear error messages with specific file names and reasons.

Completely Free

No file limit, no size limit, no watermark, no ads. All features permanently free to use.

Multi-Format Support

Supports PDF, PNG, JPG, WEBP, BMP, TIF formats. Compatible with various scanners and export files.

Frequently Asked Questions

Quick answers to common questions

Q1 Is my data secure? Will files be uploaded to a server?

Absolutely secure! This tool runs 100% locally in your browser. Files are never uploaded to any server. All PDF merging and processing happens on your device, and files are automatically cleared from browser memory after processing.

Technical Guarantees:

  • ✅ Zero server interaction - all processing in browser
  • ✅ Auto-delete - all data cleared on page refresh
  • ✅ Open source - code publicly auditable
Q2 Why can't I merge encrypted PDFs? How to handle them?

The current version does not support encrypted PDF files. If your PDF has a password or editing restrictions, the tool will intelligently detect and clearly indicate which file is encrypted.

Solutions:

  1. Method A (Recommended): Use a PDF decryption tool (like Adobe Acrobat, PDF Unlocker) to remove encryption first
  2. Method B: If you're the owner, export PDF without encryption
  3. Method C: Contact file provider for unencrypted version
Q3 Why is the merged PDF file so large? How to compress?

This tool converts PDFs to high-quality images for perfect layout, which increases file size but ensures excellent visual quality and print quality.

Built-in Solution:

  • ✅ Click the "Compress" button to set target file size (e.g., 5MB)
  • ✅ System auto-adjusts image quality to reach target size
  • ✅ Smart quality optimization ensures readability
Q4 Got "processing failed" but don't know which file is problematic?

Our intelligent error detection system precisely identifies problem files and tells you the specific reason:

Error Type Recognition:

  • 🔒 Encrypted: "File 'contract.pdf' is encrypted, password required"
  • ⚠️ Permission restricted: "File 'report.pdf' prohibits content copy"
  • ❌ Corrupted: "File 'scan.pdf' is corrupted, use PDF repair tool"
  • 📋 Version unsupported: "File 'old.pdf' version too old, convert to PDF 1.7"
Q5 Is it really completely free? Any limitations?

Yes, 100% free with no restrictions!

Our Promise:

  • ✅ No file count limit - merge dozens of files at once
  • ✅ No file size limit - only limited by your device memory
  • ✅ No usage limit - use as many times as you want
  • ✅ No watermark - generated PDFs are completely clean
  • ✅ No ads - focus on the tool itself
  • ✅ No registration required - open and use immediately