100% client-side, nothing ever leaves your browser
Merge PDF Files Online
Combine multiple PDFs into a single document, in exactly the order you choose. Everything happens locally in your browser — no uploads, no waiting, no account required.
Drag & drop PDF files here, or click to browse
Select two or more PDFs — you can reorder them next
Drag rows to reorder, or use the arrow buttons. The PDF is merged top to bottom.
Add at least 2 PDFs to merge them together.
Your PDFs have been merged
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How PDF merging works
Sadevz Merge PDF combines your files directly inside your browser using a PDF-processing library that runs entirely as JavaScript. Nothing is uploaded to a server at any point.
Add your PDFs
Drag and drop or browse for two or more PDF files. Each one is read locally and its page count and size are shown immediately.
Arrange the order
Drag rows to reorder, or use the up/down buttons. The order shown in the list is exactly the order pages appear in the merged file.
Merge and download
Every page is copied into one new PDF, preserving its original quality. Download the result straight to your device.
Privacy note: your files are processed locally in your browser and are not uploaded to Sadevz. Merging works even if you disconnect from the internet after the page loads.
Common uses
Combining scanned documents
Scanners and phone scanning apps often produce one PDF per page or per batch. Merge them into a single document before filing or sending.
Preparing a single submission
Application forms, ID documents, and supporting attachments can be combined into one PDF for portals that only accept a single file upload.
Assembling reports and portfolios
Pull together a cover page, chapters, or individual sections that were exported separately into one cohesive document, in the right reading order.
Combining invoices and receipts
Merge monthly invoices, receipts, or statements into a single file for bookkeeping, expense reports, or archiving.
Frequently asked questions
Is it safe to merge confidential PDFs with this tool?
Yes. Every PDF you add is read and combined entirely inside your browser using JavaScript. Nothing is uploaded to Sadevz or any other server, so confidential or sensitive documents never leave your device.
How many PDFs can I merge at once?
There is no fixed file-count limit. In practice you're limited only by your device's memory and browser — most everyday cases of merging a handful to a few dozen PDFs work smoothly.
Can I change the order the PDFs are merged in?
Yes. Drag any file up or down in the list to reorder it, or use the up/down arrow buttons on each row. The final PDF combines every file in exactly the order shown on screen, top to bottom.
Will merging affect the quality of my PDFs?
No. Pages are copied directly from each source PDF into the new combined document without being rasterized or re-compressed, so text stays selectable and images keep their original resolution.
Does this tool add a watermark to the merged file?
No watermark is ever added. The output is a clean, standard PDF containing only the pages from the files you merged, in your chosen order.
Can I merge a password-protected PDF?
Not directly. Password-protected or encrypted PDFs can't be read by the in-browser merge engine. Remove the password from the PDF first (for example by opening and re-saving it without a password), then merge it normally.
What happens if one of my files isn't a valid PDF?
The tool checks every file as it's added. If a file is corrupted or isn't actually a PDF, you'll see a clear error for that specific file and it won't be included, while the rest of your files are unaffected.
Do I need to sign up or install anything?
No. Merge PDF works directly in your browser with no account, no installation, and no email required, and it's completely free to use.
More tools
Additional utilities from the same toolkit. Not sure which PDF tool you need? Read the PDF Workflow Guide →