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Merge multiple PDF files into one document locally in your browser
Add PDFs in order, rearrange them, and merge into a single document. Files never leave your browser.
Click to browse or drag multiple PDFs (up to 20 files, 100 MB each)
Drop or select up to 20 PDF files (100 MB each) in the order you want them merged.
Use the up and down arrows to arrange the files — the top file becomes the first pages.
Click Merge to produce a single PDF document and download it instantly.
PDF merging runs client-side with the pdf-lib library: each source document is parsed in browser memory, its pages are copied into a new document, and the result is saved as a single PDF file. Original files are discarded from memory when you leave the page.
Unlike legacy online converters that transmit entire files to third-party cloud servers, our architecture prevents network bottlenecks, provides near-instant processing, and eliminates cloud wait queues.
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