Merge PDF Files Online Free | Combine & Optimize - OTechy
PDF Productivity Suite

Merge PDF Files Online

Combine multiple PDFs into a single optimized document. 100% Client-Side Secure.

Compress PDF Split PDF
Drag & Drop PDFs here or Click to Select
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For professionals and students in Bharat, managing digital paperwork often requires merging Aadhaar, PAN, and academic transcripts into a single file. Unlike server-based tools that risk data privacy, our Merge PDF Online Free tool runs entirely in your browser using local JavaScript. This ensures your sensitive documents never leave your device, offering a compliant and secure solution for Indian government portal submissions.

100% Privacy Guaranteed

Your files are processed locally on your device. We do not upload, store, or view your documents.

How to Merge PDF Files

1
Upload Files: Select multiple PDF documents. You can drag and drop them directly.
2
Reorder: Drag the file cards to rearrange the sequence. Set page ranges (e.g., 1-3) if needed.
3
Merge & Download: Click "Merge PDF Files" to instantly combine and download your document.

Frequently Asked Questions

Is this tool secure?

Yes. It uses client-side logic (pdf-lib). Your files are processed in your browser memory and are never uploaded to any server.

Can I reorder pages?

Yes, simply drag and drop the file cards in the list to change the order before merging.

Can I merge specific pages?

Yes. In the file list, you can enter specific page numbers (e.g., "1,3,5-7") to merge only those parts.

Is there a file size limit?

Since it runs on your device, the limit depends on your RAM. Usually, 50-100MB works smoothly.

Does it reduce quality?

No. We perform a "lossless merge," preserving the original quality of text and images.

Can I merge password-protected PDFs?

No. You must decrypt/unlock the PDF before merging it with this tool for security reasons.

Does it work on Mobile?

Yes, the OTechy merger is fully optimized for Android and iOS browsers.

What about landscape pages?

Our engine preserves the original orientation of every single page during the merge process.

Can I merge PDF/A files?

Yes, but the output will be a standard PDF unless you convert it back to PDF/A format later.

Will links work after merging?

Yes, internal and external hyperlinks are preserved in the final merged document.

Does it work offline?

Once the page is fully loaded, you can disconnect internet and continue merging files locally.

Is there a watermark?

Absolutely not. OTechy tools are 100% free and do not add any branding watermarks to your files.