Micro PDF Batch Merge Multiple PDF Files

Use the Micro PDF merge PDF tool to combine multiple PDF files into a single PDF in one click, supports drag-and-drop to adjust file order, automatically recognizes page numbers, completely preserves original file format, images and text after merging, suitable for organizing contracts, courseware, reports and other scenarios.

Whether it's 2 or 20 PDF files, they can be quickly merged through Micro PDF without worrying about layout chaos, and completely free, supports multi-platform operation, meeting file integration needs in office and study.

Table of Contents

• Key Features
• How to Use Micro PDF to Merge PDF Files
• Merge Settings and File Sorting Tips
• Post-Merge PDF Processing Tools
• Multi-Platform Support and Batch Merge
• Frequently Asked Questions

Key Features

• Support Batch Merging: Upload 1-20 PDF files in one session, total size not exceeding 200MB (free users).
• Flexible Sorting: Adjust file order through drag-and-drop or page number input, supports automatic sorting by filename/upload time.
• Format Lossless: Merged PDF fonts, images, tables, watermarks and other elements identical to original files.
• Fast Speed: 5 seconds to complete merging of 10 small files (total size under 20MB), large file processing without lagging.
• Free and Unlimited: Unlimited daily merging times, no registration required, can download directly after merging, no watermark.

How to Use Micro PDF to Merge PDF Files

The Micro PDF merge PDF tool has simple operation, completing multi-file merging in 3 steps:

1. Visit the Micro PDF website: Micro PDF, click on the "Merge PDF" tool entry.
2. Upload PDF files to be merged (supports drag-and-drop upload, or click "Select Files" to batch add, up to 20).
3. Adjust file order (drag files to move up/down), click "Start Merge", then click "Download Merged File" after processing to save result.

Merging Tips for Different Scenarios

• Merge Courseware by Chapter: First upload PDF files by chapter order, after merging automatically generates consecutive page numbers, convenient for printing or reading.
• Integrate Multiple Contracts: Merge contract body, attachments, supplementary agreements in order, avoid information omissions caused by scattered files.
• Merge Scanned Documents: Merge multiple scanned PDF images by chronological order, forming complete electronic archives.

Merge Settings and File Sorting Tips

Micro PDF provides diversified merge settings to meet personalized needs:

• Sorting Methods:
  • Manual Drag: Directly drag files to adjust order (suitable for small number of files).
  • Number Sorting: Add numbers before filenames (such as "01-Introduction.pdf", "02-Body.pdf"), tool automatically sorts by numbers.
  • Reverse Sort: Click "Reverse Order" button, reverse current file sequence (suitable for scenarios needing overall order adjustment).
• Merge Options:
  • "Preserve Original Page Numbers": Preserve each original file's page numbers in merged PDF (such as marking "From File 1 Page 3" in footer).
  • "Re-number Pages": Start unified numbering from page one after merging, suitable for documents requiring continuous reading.
  • "Add Directory Page": Automatically generate directory page containing each file name, clickable to jump to corresponding file content (VIP feature).

Post-Merge PDF Processing Tools

Merged PDF can be directly optimized using other Micro PDF tools, forming complete workflow:

• PDF Compress: If merged file is too large, compress to reduce size, convenient for sharing or storage.
• PDF Encrypt: Set password for merged sensitive files (such as contracts, internal materials), protect information security.
• PDF Split: If need to extract content after merging, can split into separate files by page numbers.
• PDF Convert: Convert merged PDF to Word, Excel and other formats, convenient for editing overall content.

Multi-Platform Support and Batch Merge

The Micro PDF merge PDF tool supports all-scenario usage, compatible with different devices:

• Web Version: Computer browsers operate directly, supports mouse drag-and-drop sorting, suitable for batch processing multiple files.
• Mobile Version: WeChat mini-program "Micro PDF" supports mobile upload file merging, suitable for quick document integration when traveling.
• Desktop Version: Client supports folder batch import PDF, automatically merge by folder order, 50% faster processing speed.

After logging in, can save commonly used merge schemes (such as fixed sort order, directory settings) as templates, directly call next time, improve efficiency.

Frequently Asked Questions

1. Will merged PDF files show format chaos?

No. Micro PDF adopts lossless merge technology, directly concatenates original file data, doesn't modify content format, text, images, tables, watermarks and other elements identical to original files, no layout chaos.

2. How many PDF files can free users merge at most in one session?

Free users can merge up to 20 PDF files in one session, total size not exceeding 200MB; VIP users support 50 files in one session, total size 500MB batch merging, and no daily usage limits.

3. Can encrypted PDF files be merged?

Yes. But need to enter password to remove encryption first (only decrypt locally, don't upload password), then can merge normally, merged file can re-set encryption permissions.

4. How to ensure correct file order during merging?

Besides manual drag-and-drop, can name files by rules before uploading (such as "01-xxx.pdf", "02-xxx.pdf"), tool will automatically sort by numbers; can also click "Preview" on merge page, confirm order page by page before merging.

5. Can merged PDF be split back to original files?

Cannot directly split back to original files, but can use Micro PDF's "PDF Split" tool, manually split by original file page count (need to record each original file's page count). Suggest backup original files before merging.

6. Will merged file have Micro PDF watermark?

No. Merged PDF files for both free users and VIP users have no watermark, completely preserve original file purity, can be directly used in formal scenarios.

7. Will files be leaked during merging?

No. All files only temporarily processed in browser or server, automatically deleted after merging completion (download or 24 hours later), server doesn't store any user files, compliant with domestic data security standards.