Combine multiple PDF files into one clean document — right in your browser. Reorder files first, then download a single merged PDF. No uploads, no sign-up, no watermark.
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Tip: use the ↑ ↓ arrows to arrange files in the exact order you want in the final document.
Put cover pages, reports and appendices in sequence before merging — reordering after the fact means splitting the file again.
Each page keeps its original size and orientation. A4 pages and letter pages can live happily in one merged file.
Encrypted files may fail to merge. Remove the password first (in your PDF reader), then merge the unlocked copies.
Merging dozens of big PDFs uses your device's memory. On a phone, merge in smaller batches if the browser feels slow.
As many as your device can handle — there is no artificial limit. Most people merge 2 to 20 files; very large jobs just need a little more memory.
Yes. After adding files, use the up and down arrows next to each file to arrange them in exactly the order you want in the final document.
No. Merging happens entirely in your browser with the open-source pdf-lib library. Your files never leave your device.
No. The output is a clean PDF with your pages in order — no watermarks, no branding, no quality loss.