Free online PDF merger. Combine multiple PDF files into one document with drag-and-drop page reordering. Merge up to 10 PDFs at once with no file size limit. 100% browser-based - your files never leave your device. No sign-up required.
100% browser-based — your data never leaves your device
PDF Merger is a free online pdf tool that combine multiple pdf files into a single document. reorder pages before merging. It works entirely in your browser — no downloads, no installations, and no server uploads required. document managers, legal teams, administrators use PDF Merger when they need a fast, privacy-respecting way to process pdf data without installing additional software. It supports capabilities such as multiple files, page reordering, privacy first. Additional features include fast processing. Common use cases include combining multiple scanned documents into a single pdf file for archiving, merging separate invoice or report pdfs into one deliverable document, consolidating chapter pdfs into a complete ebook or manual. All processing happens locally using modern browser APIs, which means your data never leaves your device. This makes PDF Merger ideal for working with sensitive data, proprietary code, or any situation where privacy matters.
PDF Merge Online Free is a free online pdf tool that helps you combine multiple pdf files into a single document. reorder pages before merging. Key capabilities include multiple files, page reordering, privacy first. All processing is done locally in your browser — no data is uploaded, stored, or shared with any server. There are no sign-ups, no file size limits, and no hidden charges. It is commonly used to combining multiple scanned documents into a single pdf file for archiving.
Select two or more PDF files from your device. You can add up to 10 files at once.
Drag and drop files to reorder them. Each file's pages will be added in order.
Click Merge to combine all files into a single PDF document, then download the result.
| Category | Details |
|---|---|
| Input Limits | Maximum file size: Browser memory bound |
| Page count: Unlimited (browser heap limit) | |
| Supported Formats | PDF 1.4–2.0, Plain text (extraction), Images (embedding) |
| Browser Engine |
|
All operations run entirely in your browser using built-in PDF APIs. No server uploads, no data storage, and no third-party requests.
PDF Merger is ideal when you need to combining multiple scanned documents into a single pdf file for archiving without installing software or uploading data to a server. Since everything runs in your browser, there is no setup time and no risk of your data being stored on external servers. For one-off tasks and quick processing, PDF Merger is faster than setting up a local development environment or using a command-line tool.
No. PDF Merger processes everything entirely in your browser using JavaScript. Nothing you type, paste, or upload is ever transmitted to any server. Your data never leaves your device.
No. All merging happens entirely in your browser using PDF-Lib. Your files never leave your device.
You can merge up to 10 PDF files at once. Each file can be any size supported by your browser.
Merge up to 10 PDF files at once into a single document.
Drag to reorder files before merging for precise document control.
All processing happens locally in your browser — files are never uploaded.
Merge documents of any size quickly with WebAssembly-powered processing.
PDF Merge Online Free is useful in a variety of scenarios across different workflows:
Combining multiple scanned documents into a single PDF file for archiving
Merging separate invoice or report PDFs into one deliverable document
Consolidating chapter PDFs into a complete ebook or manual
Drag and drop your PDFs into the correct order before clicking Merge. Once merged, reordering requires splitting and re-merging.
Large PDFs can take longer to process. If a file is very large, consider compressing it first with the PDF Compressor tool.
Explore more tools in the PDF workspace:
JPG to PDF
Convert JPG, PNG, and WebP images to PDF documents. Arrange and resize images before conversion.
PDF to JPG
Convert PDF pages to high-quality JPG, PNG, or WebP images individually or in bulk.
PDF Compressor
Compress PDF files to reduce file size. Choose between low, medium, or high compression modes.
PDF Splitter
Split a PDF file into multiple documents. Extract specific pages or divide a PDF evenly.