Merge PDF
Combine several PDFs into one file, in any order you like.
How to merge several PDFs into one online for free
Upload the PDF files you want to merge
Drag and drop the PDFs you want to combine, or click to select them from your computer. Add as many files as you need: there's no limit on quantity or size, because everything is processed in your own browser, not on a server.
Arrange the order however you like
Drag each file within the list to change the order in which they'll be combined into the final PDF. The first item in the list becomes the first part of the resulting document, and so on to the last.
Merge and download your PDF
Click the "Merge" button and in seconds your combined PDF file will be ready. Download it straight to your device — the process of merging your PDFs is 100% private, and nothing is uploaded to any server.
Why merge your PDFs on PDFDocks?
Most PDF merging websites work the same way internally: you upload your file to a server, the server processes it, and then sends it back for download. During that journey, your document—which might contain payslips, contracts, medical records, or any sensitive information—travels across the internet and remains, even if only for a few seconds, in the hands of a third party. PDFDocks works differently: PDF merging happens with JavaScript, right inside your own browser. Your files never leave your computer or phone at any point—there's no upload, no server in between, and nothing to delete afterward because it never went anywhere. This isn't just a theoretical privacy issue: it also means you don't depend on your internet connection speed for uploading large files, nor on whether the server is overloaded with other users at that moment. The process is practically instantaneous.
Is my data really private on PDFDocks?
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Yes, completely. Your PDF files are processed entirely in your browser using JavaScript. They never leave your device and are never sent to our servers. We cannot access, store, or see your documents in any way.
Can I merge PDFs on any device?
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Yes, as long as your device has a modern web browser (Chrome, Firefox, Safari, Edge, etc.). PDFDocks works on Windows, Mac, Linux, iPhone, and Android. No software installation needed.
Is there a file size limit?
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Your browser's memory is the only limit. In practice, most browsers can handle PDFs totaling 100-500MB without issues. If you hit a limit, try merging in smaller batches.
Will the merged PDF lose quality?
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No. PDFDocks uses PDF.js, which preserves the original quality of all pages. The output file maintains the same resolution and visual integrity as the source documents.
Do I need to create an account?
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No. PDFDocks requires no registration, login, or email. Simply upload your PDFs and start merging immediately.
What formats can I merge?
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PDFDocks merges PDF files exclusively. If you need to merge other formats (Word documents, images, etc.), you may want to convert them to PDF first using our conversion tools.
Tools
Split PDF
Extract specific pages or split your PDF into ranges.
Rotate PDF
Rotate the pages you need, one by one or all at once.
Compress PDF
Reduce the file size by re-optimizing its content.
PDF to images
Convert every page into a high-quality PNG image.
Images to PDF
Combine your photos or images into a single PDF document.
Watermark
Add overlay text to every page of your PDF.
Protect PDF
Add a password to restrict access to the file.
Unlock PDF
Remove the password from a PDF if you know it.
Remove pages
Delete the pages you don't need from your PDF document.
Extract pages
Select and save only the pages you need.
Reorder PDF
Freely reorganize, move or rearrange the pages in your document.
Crop PDF
Remove margins or adjust the visible area of the page.
Page numbers
Add page numbering with custom position, style and font.
Fill PDF forms
Detect fields and fill in existing PDF forms.
Sign PDF
Draw your signature and stamp it onto any page of the document.
Scan to PDF
Capture documents from your phone and send them straight into a PDF.
OCR PDF
Turn scanned PDFs into documents with selectable, searchable text.
PDF to Markdown
Extract your PDF's content into editable Markdown text.
Word to PDF
Convert Word (.docx) documents into PDF format.
Excel to PDF
Turn Excel spreadsheets (.xlsx) into PDF documents.
Compare PDF
Place two versions of a PDF side by side to spot the differences.
Redact PDF
Permanently cover up text or graphics containing sensitive information.
Repair PDF
Attempt to recover and fix damaged or corrupted PDF files.
JPG to PDF
Convert one or several JPG photos into a single PDF document.
PNG to PDF
Convert one or several PNG images into a single PDF document.
PDF to JPG
Convert every page of your PDF into a JPG image.
PDF to PNG
Convert every page of your PDF into a high-quality PNG image.
WEBP to PDF
Convert one or more WEBP images into a single PDF document.
PDF to WEBP
Convert each page of your PDF into a lightweight, high-quality WEBP image.
PDF to Word
Extract text from your PDF into an editable Word document (.docx).
PDF to Excel
Extract text and tables from your PDF into an Excel spreadsheet (.xlsx).
HEIC to PDF
Convert one or multiple HEIC photos (iPhone format) into a single PDF document.
EML to PDF
Convert an email (.eml) into a PDF document, including sender, recipient, subject, and message body.
MHT/MHTML to PDF
Convert a web page saved in MHT or MHTML format into a PDF document.
