Merge PDF
Combine multiple PDF documents into a single PDF in your browser with drag-and-drop reordering.
Click to upload or drag & drop PDF files
Select multiple PDF files to combine. Files will be merged in the exact order shown below.
How to use Merge PDF
- 1Upload two or more PDF files by clicking the upload area or dragging files directly into the box.
- 2Adjust the document order using the Move Up and Move Down buttons next to any file.
- 3Click 'Merge PDFs' to combine the files using our local in-browser WebAssembly engine.
- 4Click 'Download Merged PDF' to save your new consolidated document.
Key Features & Highlights
- •100% Client-Side Processing: Merges documents locally inside your browser via pdf-lib. No documents are ever uploaded to cloud servers.
- •Drag & Drop File Management: Upload multiple documents at once and customize merge ordering.
- •Page Count & File Size Inspection: Displays individual file weights, page numbers, and total output size.
- •Encrypted PDF Detection: Identifies password-protected PDFs and informs you gracefully.
- •No Watermarks & No Size Caps: Unlimited free merges without branding or document limitations.
How Browser-Based PDF Merging Works
Most commercial online PDF utilities require uploading sensitive documents—such as tax returns, legal agreements, medical histories, or company reports—to third-party cloud servers.
Zero-Upload Privacy Architecture
BrivTools merges your PDFs completely client-side using JavaScript and binary stream parsing. Your files are loaded into your device's local RAM memory, where individual page streams and cross-reference tables are assembled into a single continuous PDF container.
Preserving Hyperlinks and Vectors
The merger preserves vector graphics, embedded fonts, and page dimensions without rasterizing or compressing visual elements, ensuring pristine print quality.
Frequently Asked Questions
How does BrivTools merge PDF files in the browser?
We utilize pdf-lib, a high-performance JavaScript PDF manipulation engine that runs entirely in your local browser sandbox. When you add PDF files, their binary streams are combined client-side without transmitting any bytes across the internet.
Are my confidential PDF documents uploaded or stored anywhere?
No! Unlike conventional cloud converter websites that upload your financial, legal, or personal documents to remote cloud servers, our merge process runs 100% locally on your machine. Your documents never leave your browser.
How do I control the order of the merged PDF?
You can arrange your files by clicking the Move Up and Move Down arrow buttons next to each file in your queue, or by dragging and dropping them into your desired order before clicking 'Merge PDFs'.
Is there a limit on how many PDF files I can combine?
There is no arbitrary restriction imposed by our website. Because processing happens in your device's memory, you can merge dozens of standard documents without issue. For very large PDFs (e.g. hundreds of megabytes), browser RAM availability will be the only practical constraint.
Can I merge password-protected (encrypted) PDFs?
Encrypted or password-locked PDFs must be unlocked before merging. If an encrypted file is detected, the merger will display a clear error advising you to remove the password before attempting to combine.
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