Free Online Tool
Merge PDF
Combine multiple PDF files into one document, reorder files with Up/Down controls, and download instantly. This service is 100% free.
Limit: up to 50 PDF files, each max 50 MB
How to Merge PDF Files
Select two or more PDF files from your device.
Use Up/Down in the queue to set the final output sequence.
Merge all files and download one combined PDF file.
Why Use This Merge PDF Tool
This free tool is useful for combining chapter files, assignments, invoices, reports, scanned pages, and any multi-part PDF documents into a single file.
Common Errors and Fixes
Merge button disabled: add at least 2 valid PDF files.
Wrong page order: reorder files in queue before merging.
Unsupported file error: make sure every file is PDF format.
Large files are slow: very large PDFs take longer in browser-based processing.
Privacy and Processing
Your files are processed in your browser in this free version. Files are not uploaded to our server during merge.
Related Tools
Need page extraction? Use Split PDF. Need image output? Use PDF to JPG. Need smaller final PDF? Use PDF Compressor.
FAQ: Merge PDF
Is this tool free? Yes, Merge PDF is free to use.
Can I reorder PDF files before merge? Yes, use Up/Down controls in the queue.
Can I remove one file from queue? Yes, use the delete icon on each file card.
What is the file limit? Up to 50 PDF files, each file up to 50 MB.
Are files uploaded to your server? No, files are processed in your browser in this version.