Merge PDF
Merge PDF joins several PDF documents into one file, keeping the pages of each document in the order the files were added. Contracts split across attachments, scanned chapters and multi-part reports are the usual candidates.
Drag & drop files here
or Browse files
Max file size: 100 MB
Processed locally in your browser. Files are cleared when you leave the page.
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Why use Merge PDF?
PDF is the format people reach for when a document has to look identical everywhere — on a phone, on a colleague's laptop and on paper. Converting to or from PDF lets you keep that fixed layout for sharing and archiving while still being able to edit, split, merge or shrink the file when the job changes. Doing it in the browser means a contract, payslip or ID scan never has to be uploaded to a stranger's server just to change its format.
How to use Merge PDF
- 1Add two or more PDF files to the upload area.
- 2Review the file order — the merged document follows it exactly.
- 3Press Convert now to build the combined document.
- 4Download the merged PDF.
Features
- Page content, text layers and embedded fonts are copied as-is, not re-rendered.
- No page count limit beyond what your browser memory allows.
- Original files stay untouched on your device.
Supported formats
- Input
- Output
Your privacy
This tool runs entirely in your browser using JavaScript and WebAssembly. The file you select is read into your device's memory, converted there and offered back as a download — it is never uploaded to our servers. Closing or reloading the page clears it. If you are signed in, we store only the tool name, the number of files and their total size so you can see your own activity history; the file contents are never sent.
Tips for the best result
- Check the page order in the file list before converting — pages are produced in the order shown.
- Scanned pages photographed at an angle convert better if you crop them first; the tool preserves what it is given.
- For very large PDFs, close other heavy browser tabs so the page has more memory to work with.
- Open the finished PDF before sending it, especially for documents that have to print exactly.
Frequently asked questions
How many PDFs can I merge at once?
There is no fixed limit. The practical limit is the combined size of the documents and the memory available to your browser.
Can I change the order of the documents?
The merge follows the order of the file list, so add the files in the sequence you want, or clear the list and add them again.
Does merging reduce quality?
No. Pages are copied between documents without re-compression, so text stays selectable and images keep their original resolution.
Are my documents uploaded?
No. The conversion runs in your browser with JavaScript and WebAssembly, so the file never leaves your device and nothing is uploaded to our servers.
Is it free?
Yes. Every tool on Fast File Convert is free to use, with no account and no daily limit.
Related reading
- How to convert JPG to PDFA step-by-step guide to turning one or more JPG photos into a single PDF document, plus tips on page order, file size and scan quality.
- What is a PDF file?What the PDF format is, why it looks the same everywhere, the difference between text and scanned PDFs, and what it is bad at.
- How to convert Word to PDFHow to turn a DOCX document into a PDF, what converts reliably, what to check before sending, and when to fix the source document instead.
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