How do I merge PDF files?
Drop your PDFs into the zone or click to add them, arrange them in the order you want, then click Merge PDFs. The combined file downloads straight from your browser.
Is the PDF merger free?
Yes, it is free with no signup and no watermarks. Merge as many files as you need.
Are my files uploaded to a server?
No. All merging is done in your browser with the pdf-lib library. Your documents are never sent anywhere.
Is there a file size or page limit?
There is no hard limit in the tool. Very large files depend only on your device memory, since everything runs locally.
Can I reorder pages between files?
You can reorder whole files in the list before merging. To reorder individual pages inside a file, split or pre-arrange it in another tool first.
Can I merge more than two PDFs?
Yes. Add as many PDFs as you like; they are combined in the list order.
What formats are supported?
Input and output are PDF. To merge images, convert them with the image to PDF converter first.
Will formatting and quality be preserved?
Yes. Pages are copied as-is, so text, fonts, and images keep their original quality.
Can I merge password-protected PDFs?
Encrypted PDFs cannot be read by the browser library, so remove the password or use an unlocked copy first.
Is there a desktop alternative?
Desktop apps like Adobe Acrobat or Apple Preview can also merge PDFs and add editing. Use them when you need features beyond joining files; use this page for a quick, private, no-install merge.
Does it work on mobile?
Yes. The tool runs in any modern mobile browser and processes files locally.
Can I split a PDF here?
This tool merges only. For splitting or other edits, use a desktop PDF editor.
A PDF merger combines two or more PDF documents into a single file while preserving every page in order. Our merge PDF online tool uses the pdf-lib library running in your browser, so the files are read and stitched together on your device. You can drag and drop documents, reorder them, and download the combined result without installing anything.
Merge scanned chapters into one ebook, assemble a portfolio from separate exports, or join signed pages into a single contract. It is also useful for consolidating reports, invoices, and forms before emailing. If your source is an image set rather than PDF, convert it first with our image to PDF converter.
Desktop PDF editors add editing, signing, and OCR but require installation and often a license. An online merger is faster for the single job of joining files and needs no account. Unlike many cloud services, ours never uploads your documents — the merge happens locally, which matters for contracts and personal records. You can then convert SVG to PDF or compress SVG for related artwork.
Your PDFs are parsed with JavaScript in the page; no bytes are sent to a server. The merged file is built and downloaded on your machine. For sensitive documents this local processing is safer than uploading to a third-party site.
Scanned pages arrive as image-only PDFs, which are large and not searchable. Before merging, compress them with the image compressor and, if needed, resize with the image resizer so each page fits a standard sheet. Merging smaller inputs keeps the final file fast to open and easy to email.
When documents are combined, the result inherits the largest page size in the set. If a report looks uneven, standardize source sizes first. Very large merged files can be trimmed by compressing embedded images; the image converter helps prepare source scans. You can also keep the merged PDF lean by excluding blank or duplicate pages before merging.
Cloud merge tools are convenient but require you to trust a server with the contents. A browser-based merge avoids that trade-off: the bytes never leave the tab. Choose local processing for contracts, tax forms, and medical records, and reserve cloud services for throwaway documents.
Most users combine a few everyday document types. Students merge lecture slides with assignment sheets before submitting. Small teams join separately scanned contract pages into one signed file. Designers attach a cover page in front of a multi-page portfolio. Because the tool keeps the original page order until you drag to rearrange, it is easy to build a polished packet without desktop software.
Image-based scans are placed as full pages, so text inside them stays searchable only if the source was already a real PDF. For fully searchable output, run OCR before merging. The join step itself never re-compresses a page unless you choose a smaller size, so a clean source stays sharp in the final document.
