# Merge PDF > Combine multiple PDFs into one document. - Page: https://acepdfmd.com/tool/merge/ - Updated: 2026-09-12 - Runs at: https://acepdfmd.com (Uploaded files are deleted within 60 minutes. No signup for light use.) - Also in 29 languages: https://acepdfmd.com//tool/merge/ ## Merge PDF files into one document Expense receipts, signed contract pages, a scanned ID and a cover letter: these often arrive as separate PDFs when what you actually need to send or file is one. Merge PDF takes any number of PDF files and stitches them together in the order you add them, producing a single document with every page from every file intact. You can add as many PDFs as the job needs, and the whole job runs right there in your browser, so your files never leave your device. If a batch is too large for your browser to handle, you will see a message asking you to try fewer or smaller files rather than a silent upload. Either way the output is one continuous PDF, ready to attach, print, or archive. Check the order of your files before you merge, since the finished document follows the sequence you set and there is no reordering step afterward. If a page came out rotated or upside down in one of the source files, it stays that way in the merged copy, so fix that first. This tool only combines pages; it does not remove any, so if you need to drop a cover sheet or a blank page from one of the files, handle that beforehand or run Split PDF afterward to pull out just the pages you want to keep from the finished file. ## How to use the Merge PDF tool 1. Add your PDF files: drag & drop or click to browse; you can add several. 2. Click “Process Merge PDF” and download your result. ## Common questions ### Is Merge PDF free? Yes. Merge PDF is free for light use with no signup needed. Anonymous visitors get 10 free tasks per day, and creating a free account makes daily use unlimited. A paid Pro plan removes ads and raises file-size limits for heavier work. ### Is my file safe? Yes. Simple files are processed directly in your browser and never leave your device. Larger or more complex files are sent over HTTPS, processed by self-hosted open-source software on our servers, and deleted within 60 minutes at the latest. ### What file formats does Merge PDF accept? Merge PDF accepts PDF files. Convert other formats to a supported one first; the related tools below can usually do it. ## Related tools - [Split PDF](https://acepdfmd.com/tool/split/): Extract page ranges. - [Organize PDF](https://acepdfmd.com/tool/organize/): Reorder or delete pages. - [Delete PDF Pages](https://acepdfmd.com/tool/delete-pdf-pages/): Remove specific pages from a PDF. - [Extract Pages](https://acepdfmd.com/tool/extract/): Pull specific pages into a new PDF. - [Compress PDF](https://acepdfmd.com/tool/compress/): Shrink file size by optimizing images. - [Add Page Numbers](https://acepdfmd.com/tool/page-numbers/): Insert page numbers into your document. - [ZIP to PDF](https://acepdfmd.com/tool/zip-to-pdf/): Convert every supported file inside a .zip and merge them into one PDF. Read the guide: [PDF Page Sizes and Dimensions: A4, Letter, Legal and More](https://acepdfmd.com/guides/pdf-page-sizes/)