Quick Answer
Drag and drop up to 200 PDF files into the merge tool, arrange the order, and click "Merge." A progress tracker shows each file being processed.
What You'll Need
Step-by-Step Guide
Follow these 5 simple steps to get the job done in about 1-2 minutes. Check off each step as you go.
Open the Merge Tool
Navigate to the PDFly Merge PDF tool page. You'll see a drag-and-drop upload zone ready for your files.
Upload Your Files
Drag and drop your PDF files (or images) into the upload zone. You can add multiple files at once — PDFly supports up to 200 files in a single merge operation.
Arrange the Order
Once uploaded, drag the file thumbnails to reorder them. You can also use the up/down arrow buttons next to each file to fine-tune the sequence.
Configure Options
Choose whether to keep original page sizes or normalize them. For password-protected PDFs, enter the password when prompted. Enable OCR if merging scanned documents.
Merge and Download
Click the "Merge" button. Processing happens instantly in your browser. Once complete, the merged PDF downloads automatically.
Key Takeaways
PDFly merges files entirely in your browser — no uploads, no server processing
You can mix PDFs, images, and Office documents in a single merge
Reorder files by dragging thumbnails before merging
The merged PDF never has a watermark — it's completely free
Pro Tips & Best Practices
You can mix different file types (PDF, Word, Excel, images) in a single merge — non-PDF files are auto-converted.
For best results, ensure all source files are in the correct orientation before merging. Use Rotate PDF first if needed.
If merging scanned documents, enable OCR to make the combined PDF fully searchable.
The merged PDF inherits the page size of the first file by default. Use the "Normalize" option to standardize all pages.
Common Mistakes to Avoid
Uploading files in the wrong order
Drag the thumbnails to reorder before merging. The top-to-bottom order is your final page order.
Forgetting to remove password protection first
Use the Unlock PDF tool on protected files before merging, or enter the password when prompted.
Merging files with different page orientations
Use Rotate PDF on individual files first, or enable the "Normalize" option during merge.
Ready to Try It Yourself?
That's it! You now know how to merge 50+ pdfs at once using PDFly. The entire process takes less than a minute and runs entirely in your browser — your files are never uploaded to a server. Ready to try it yourself? Use the Merge PDF tool below to get started right now.
Open Merge PDF — Free, No SignupFrequently Asked Questions
PDFly supports merging up to 200 files in a single operation. Since processing happens in your browser, the practical limit depends on your device's available memory.
No. PDFly never adds watermarks to your files. All tools are completely free with no hidden costs or branding.
Yes. You can mix PDFs, Word documents, Excel files, and images in a single merge. Non-PDF files are automatically converted to PDF before merging.