Can I merge PDF documents for an ITR or government submission?

Yes. Upload all your documents, drag to reorder if needed, and merge into one PDF. Most government portals accept merged PDFs under 2MB — compress the merged file if it exceeds that.

How many PDFs can I merge at once?

Up to 20 PDFs in one operation. You can reorder them before merging by dragging or using the arrow buttons.

Is my file uploaded to a server?

No. Merging runs entirely in your browser using pdf-lib. Your files never leave your device.

Does it preserve all pages and formatting?

Yes. All pages from all PDFs are included in the merged output. Formatting, embedded fonts, and images are preserved.

Does it work on encrypted PDFs?

No. Each PDF must not be password-protected. Use the Unlock PDF tool on any encrypted files first.

Does it work on mobile?

Yes. Works on iOS Safari and Android Chrome without any installation.

Merge PDF Files Online Free

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Split PDF

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Number after merging

PDF Studio

Full PDF pipeline

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Try PDF Studio - all tools in one place

Merge, compress, rotate, watermark and add page numbers to PDFs in a single workflow - 100% browser-based.

Full PDF pipelineNo uploadsDrag to reorder

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What is merge pdf files online free?

Merging PDFs is one of the most common document tasks - combining invoices, reports, chapters, scanned pages, or contracts into a single shareable file. Vakru merges up to 20 PDFs in your browser using pdf-lib, preserving all pages and formatting. Drag to reorder files before merging. No upload, no signup, free forever.

Combine up to 20 PDFs into oneReorder files before merging with drag or arrowsPreserves all pages, fonts, and imagesWorks on any non-encrypted PDFNo upload - runs in browser with pdf-lib100% private - files stay on your device

How it works

Merge PDFs into a single file with drag-and-drop ordering - completely free and 100% browser-based.

Upload multiple PDFs

Drop up to 20 PDF files at once. Each file is parsed locally - no server upload, no hidden file size cap.

Reorder the files

Drag the file tiles to set the merge order. Thumbnails make it easy to put pages in the right sequence.

Click Merge PDF

Combine every PDF into a single document in seconds. Page quality, bookmarks and metadata are preserved.

Download merged PDF

Save the combined PDF with one click. No watermarks, no signup, no page limits.

💡 Pro Tips

Compress individual PDFs before merging

Merging large PDFs produces a large output. Compress each file first with the Compress PDF tool - the savings stack up.

Add page numbers after merging

Page numbers added before merging reset per file. Add them after merging for consecutive numbering across the whole document.

Unlock encrypted PDFs before merging

Password-protected PDFs cannot be merged. Use the Unlock PDF tool to remove the password first.

Use drag-to-reorder for precise control

Drag files into the exact order you want - cover page first, appendix last. The order you see is the order in the merged PDF.

Frequently Asked Questions