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0 PDFs selected
Drag files to reorder merge sequence
Output Filename
PDFs Merged Successfully!
How to Merge PDF Files Online
- 1
Upload your PDF files
Click the upload area or drag and drop multiple PDF files. You can add more files at any time.
- 2
Arrange the order
Drag the file cards to set the order pages will appear in the merged PDF.
- 3
Click Merge & Download
Processing happens in your browser — then download your merged PDF instantly.
Best Practices & Limitations
Tips for best results
- Drag files into the order you want before merging — the tool doesn't auto-sort by filename or date.
- Merge related documents (invoice + receipt + contract) into one file before sending to keep an email thread cleaner.
- Compress the merged file afterward if combining several already-large PDFs.
Limitations & when not to use this tool
- Doesn't merge or renumber form fields with the same name across source files — duplicate field names can behave unpredictably.
- Bookmarks from source files aren't automatically combined into a unified table of contents.
- Very large combined files (hundreds of MB) can be slower to process since merging happens in your browser's memory.
About merge PDF
Combine multiple PDF files into one document while keeping the pages in the order you choose. PDFly lets you upload several files, reorder them, and create a single PDF without changing the original files.
Common uses for merge PDF
Useful for combining reports, invoices, applications, contracts, assignments, scanned documents, and presentation handouts.
Tips for using this PDF tool
Choose a clear page order before merging. If a source file contains unwanted pages, remove them first so the final PDF stays focused.
Related PDF tools
Want a step-by-step walkthrough? Read the Merge PDF guide.
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