PDF Merger Online
Combine multiple PDFs into one
Como usar Unir PDF
- 1
Add PDF files
Drag and drop or select multiple PDF files.
- 2
Reorder if needed
Drag files to arrange them in the desired order.
- 3
Merge & download
Click merge to combine them and download the result.
Perguntas frequentes
Is my data safe?
Is there a limit on the number of PDFs?
Will the merged PDF keep bookmarks?
Does it work with password-protected PDFs?
Can I merge PDFs on my phone?
Saiba mais
O que é Merge PDF?
Combine multiple PDF files into a single document with drag-and-drop reordering. Whether you need to merge contracts, combine report sections, or assemble a portfolio, this tool handles it instantly in your browser. Unlike most online PDF mergers, your files are never uploaded to any server — all processing happens locally using the pdf-lib library. No sign-up, no watermarks, no file size limits, and no daily usage caps.
Por que usar Merge PDF?
- Complete privacy — your PDFs never leave your device. Most online mergers upload your files to their servers, which is a risk for sensitive documents.
- No file count limits. Merge 2 PDFs or 20 — there are no artificial restrictions.
- Drag-and-drop reordering lets you arrange documents in exactly the order you need.
- No watermarks or branding added to your merged PDF, even though it is completely free.
- Works offline once the page loads — no internet connection required for the actual merge.
Casos de uso de Merge PDF
Assembling reports
Combine a cover page, table of contents, and individual chapter PDFs into a single polished document for distribution.
Consolidating invoices
Merge monthly invoices, receipts, or expense reports into one PDF for bookkeeping or tax filing.
Creating portfolios
Combine design samples, certificates, or work examples into a single portfolio PDF for job applications.
Preparing legal documents
Merge signed contracts, appendices, and supporting documents into one complete file for records.
Dicas e boas práticas
- 💡Add files in the order you want them, then fine-tune with drag and drop — it is faster than reordering everything afterward.
- 💡For very large PDFs (50+ MB), consider compressing them individually first using the PDF Compressor tool, then merging.
- 💡If you only need specific pages from each PDF, use the PDF Splitter to extract them first, then merge the extracted pages.
- 💡The merged PDF preserves the original page sizes — if your PDFs have different page dimensions, they will appear as-is in the merged output.
Como se compara
Most popular PDF mergers like Smallpdf, iLovePDF, and Adobe Acrobat Online require uploading your files to their servers, which raises privacy concerns for sensitive documents. Some also add watermarks or limit free usage to a few files per day. TinyTool's merger processes everything client-side using pdf-lib, so your PDFs never leave your device. The trade-off is that very large files (100+ MB) may be slower to process since they rely on your device's memory rather than a powerful server.
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