Merge & Compress PDF Online — Free & Secure
Combine PDF files or reduce PDF size in seconds. Works right in your browser — your files never leave your device.
Drop your PDF files here
or click below to select from your device
100% free • Works offline in your browser • No file uploads to servers
All PDF Tools
Pick the tool you need — every tool is free, browser-based, and secure.
Merge PDF
Combine multiple PDF files into one document.
Compress PDF
Reduce PDF file size without losing quality.
JPG to PDF
Convert JPG images into a single PDF file.
PDF to Word
Convert PDF files to editable Word documents (with OCR).
Word to PDF
Convert Word (.docx) documents into shareable PDFs.
PDF to PPT
Convert PDF files into editable PowerPoint presentations.
PPT to PDF
Convert PowerPoint (.pptx) presentations into PDF files.
PDF to JPG
Convert PDF pages to JPG or PNG images in high quality.
Split PDF
Split PDF into pages, extract page ranges, or divide every N pages.
HTML to PDF
Convert HTML files or code into clean, shareable PDF documents.
Unlock PDF
Remove passwords and restrictions from your PDF files securely.
Protect PDF
Add a password to any PDF — strong AES encryption in your browser.
Why choose PDF Merger Online?
Built for speed, privacy, and simplicity — the easiest way to combine PDFs.
100% Private
Files are merged locally in your browser. No uploads to any server, ever.
Lightning Fast
Merge dozens of PDFs in seconds using modern browser APIs.
Free Forever
No signup, no watermarks, no limits. Just merge and download.
Works Everywhere
Fully responsive — mobile, tablet, and desktop friendly.
Custom Order
Drag or use arrows to reorder PDFs before merging.
No Installation
Nothing to download or install. Open the site and start merging.
How to Merge PDF Files Online
Select PDFs
Click the button above or drag PDF files from your desktop or gallery.
Arrange Order
Use the arrows to reorder your files exactly how you want them merged.
Download
Click Merge and instantly download your combined PDF file.
Frequently Asked Questions
How do I merge PDF files online for free?+
Simply select your PDF files using the upload area above, arrange them in the desired order, and click the Merge button. Your combined PDF will be ready to download instantly.
Is PDF Merger Online really free?+
Yes — completely free. No signup, no watermarks, no hidden charges. Merge as many PDFs as you want.
Are my PDF files secure?+
Absolutely. All processing happens locally in your browser using JavaScript. Your files never get uploaded to any server.
Can I merge PDFs on my phone?+
Yes. The tool is fully mobile-friendly and works on Android, iPhone, iPad, and any modern browser.
Is there a limit on how many PDFs I can merge?+
There's no artificial limit. You can merge as many files as your device memory can handle.