# Merge PDF > Combine multiple PDF files into one document. Drag to reorder pages, merge unlimited files — completely local, no server upload, no signup. Merge PDF combines several PDF files into a single document in the exact order you choose, entirely inside your browser. Drag to reorder, add as many files as you like, and download the result — your documents are never uploaded to a server. - **Live tool:** https://www.toolnova.org/pdf-tools/merge-pdf - **Category:** PDF Tools (https://www.toolnova.org/pdf-tools) - **Price:** Free - **Requirements:** Runs in a modern web browser · No signup · No install ## What this tool does - Drag-and-drop file reordering - Unlimited file merging - Local browser processing - Privacy-focused — no server upload ## How to use Merge PDF 1. **Add your PDFs** — Drop in two or more PDF files you want to combine. 2. **Reorder them** — Drag the files into the sequence you want them to appear in the final document. 3. **Merge** — The tool stitches the pages together locally into one PDF. 4. **Download** — Save the combined file — no watermark, no signup. ## Common use cases - A student combines lecture handouts into one study PDF. - A freelancer merges a cover letter, invoice, and contract into a single deliverable. - An applicant assembles scanned documents into one file for an online form. - An office worker joins monthly reports into a single archive. ## About ### Combine without losing quality Merging copies each page as-is into a new document, so text stays selectable and images keep their original resolution. Nothing is re-compressed or rasterized — the pages you put in are exactly the pages you get out, just in one file. ### Order is everything Because you drag files into place before merging, the final sequence is fully under your control. Reordering here is far faster than printing, rescanning, or fighting with a desktop PDF editor. ### Private by default Contracts, IDs, and financial statements shouldn't be uploaded to a stranger's server just to be joined. This merger runs in your browser, so the files never leave your device — a real difference for sensitive paperwork. ## FAQ ### How do I merge PDF files online for free? Upload your PDF files by dragging them into the tool or clicking to select. Drag them into your preferred order, then click 'Merge PDF'. Download the combined file instantly — no signup or software needed. ### Is there a limit to how many PDF files I can merge? The limit depends on your browser's available memory. Most computers can easily merge 10-30 files at once. For very large batches, merge in groups of 10 and then merge the results together. ### Does merging PDFs affect the quality? No. The tool combines PDFs at their original quality. No re-compression, no resolution loss — the output file is identical in quality to the original files. ### Are my PDF files uploaded to a server? No. All PDF merging happens locally in your browser using the PDF-lib JavaScript library. Your files never leave your device, making it safe for confidential documents. ### Can I merge password-protected PDF files? Password-protected PDFs need to be unlocked first before merging. Remove the password using a PDF unlocker tool, then merge the unlocked files. ### How do I reorder pages when merging PDFs? After uploading your files, drag the file cards into your desired order. The merged output will follow exactly the order you arrange them. You can also rearrange individual pages if needed. ### What is the difference between merging PDFs online and offline? Online tools that upload files to a server carry privacy risks — your documents pass through third-party servers. This tool merges PDFs entirely in your browser using PDF-lib (a JavaScript library), so your files never leave your device. It works offline too once the page has loaded. ### Is there a limit on how many PDFs I can merge? There's no fixed limit — you're bounded only by your device's memory, since everything runs locally. ### Are my files uploaded to a server? No. The merge happens entirely in your browser and nothing is transmitted. --- ToolNova — free, privacy-first browser tools. Most tools process data locally on your device. See https://www.toolnova.org/llms.txt for the full directory.