Combine multiple PDF files into a single document in your desired order.
How to Use PDF Merger
Drag and drop or select two or more PDF files - each appears as a file card with its name and size.
Reorder files by dragging their cards, or remove one with the trash icon if you added it by mistake.
Click "Merge" to combine them in the order shown, then download the single resulting PDF.
Key Features & Practical Use Cases
Combining multiple scanned receipt files or invoice prints into a single file for direct tax declarations.
Merging separate homework or project pages into one file before uploading to academic portals.
Stitching multiple PDF reports from different quarters into a consolidated annual corporate report.
Frequently Asked Questions
Can I control the order of the merged pages?
Yes - files are merged in the exact order their cards appear in the list, and you can drag them to reorder before merging.
Is there a limit to how many PDFs I can merge at once?
No hard limit is enforced - since merging happens in your browser, very large batches just take a little longer depending on file sizes and your device.
Are my PDFs uploaded to a server to be merged?
No - merging is done entirely client-side using pdf-lib in your browser; your files never leave your device.
About OneClickly
OneClickly offers 100+ premium online tools for PDF operations, image compression and conversion, text utilities, calculators, and developer tools. All tools run 100% in your browser - no file uploads, no data collection, maximum privacy guaranteed.
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