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PDF Merger

Upload PDFs, preview every page as thumbnail, drag to reorder, then merge into one PDF — all in your browser, 100% private

How to Merge PDFs with Page Preview

Upload your PDFs: Click the upload zone or drag and drop multiple PDF files. All processing happens entirely in your browser — no files are sent to any server.

Preview & reorder pages: Every page from all your PDFs renders as a thumbnail. Drag and drop individual pages to reorder them exactly how you want them in the final PDF.

Remove unwanted pages: Click the ✕ button on any page thumbnail to exclude it from the merged PDF.

Merge & download: Click "Merge & Download PDF" to combine all pages in your chosen order and download the result instantly.

Frequently Asked Questions

No files are ever uploaded to our server. The entire PDF merging process — reading, rendering, reordering, and combining — happens locally in your browser using JavaScript. Your documents stay on your device.

Since processing happens in your browser, limits depend on your device's RAM. Most modern devices can comfortably handle 10–15 PDFs with up to 50 pages each. For very large files, we recommend using a desktop browser.

Yes! Our tool treats all pages from all uploaded PDFs as one pool. You can freely mix and reorder pages from different source PDFs to create your custom combined document.

The merged PDF is generated using PDF-lib, which produces standard PDF 1.7 files compatible with Adobe Acrobat, Chrome, Edge, and all modern PDF viewers.