Combine multiple PDFs into one file in seconds.
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Combine multiple PDF files into a single document in seconds. Perfect for merging contracts, reports, invoices, or any documents you need in one file. No software to install, no account required.
Add up to 10 PDF files at once. Files are processed securely and deleted within 1 hour.
Click "Choose PDFs" and select multiple files, or drag and drop them into the box.
We combine your files in the order shown. Use "Add more" to add additional files.
Click download to save your combined PDF. One file, all pages in order.
Yes, 100% free. No account or payment required.
Up to 10 PDF files per merge, each up to 100MB.
Yes — files are merged in the order they appear in the list.
All files are automatically deleted within 1 hour.
Input: Multiple PDF (.pdf) files
Output: Single combined PDF (.pdf)
Maximum file size: 100 MB total upload. If your file is larger, compress or split it first using our other free tools, then return here.
Yes. FastConvertTools is free to use with no account required. We fund the site through advertising so you can convert files without a paywall.
Files are transferred over HTTPS to our conversion partner for processing and are typically deleted from their servers within about one hour. We do not use your documents to train models or build marketing lists.
PDF and video tools accept up to 100 MB total upload per job unless the upload area states otherwise. Image and text tools may use browser limits instead of a fixed cap.
Any modern device with a current browser works. Phones and tablets can upload from the gallery or files app; desktops support drag-and-drop. Disable aggressive ad blockers only if they block the conversion script—never disable HTTPS.
Pages are appended as-is. Mixed portrait and landscape pages remain mixed inside one file. Reorder or rotate individual sources beforehand if you need a uniform layout.
Merging concatenates separate PDFs into one continuous document without retyping content. Finance teams combine invoices and receipts for month-end review, students staple lecture handouts with assignments, and HR bundles offer letters with policy PDFs for onboarding packets. Unlike printing and scanning again, digital merge preserves selectable text when the sources were born-digital. Large mergers can still produce heavy files if every chapter is a high-resolution scan, so consider compressing afterward. Bookmarks and outlines may not always survive depending on how each source was authored; open the result in your usual reader to confirm navigation still makes sense. For court or compliance submissions, check whether the receiving body requires separate files instead of one bundle, because some portals cap both per-file and total package size.
FastConvertTools focuses on straightforward workflows: upload or paste, convert, download, and move on with your day. Whether you are a student fixing one assignment, a freelancer delivering client assets, or an office administrator unblocking an email attachment limit, you get clear steps on this page and predictable limits before you start. When results must be perfect, always keep an original copy and spot-check the output against your source—automated conversion saves time, but human review still wins for high-stakes documents.