How many PDFs can I merge at once?

There's no artificial limit on the number of files you can merge. Users regularly combine 50-100+ documents in a single operation. The only constraint is your device's available memory, since all processing happens locally in your browser. For extremely large batches (hundreds of files totaling gigabytes), you may want to merge in groups of 20-30 files at a time for optimal performance.

Will merging affect the quality of my PDFs?

Absolutely not. Our merge tool performs a lossless combination of your PDF files. Every element is preserved exactly as it appears in the original documents: text remains fully searchable and selectable, images retain their original resolution and compression, vector graphics stay perfectly crisp at any zoom level, and embedded fonts display correctly. We don't recompress or re-render your content.

Can I rearrange individual pages from different PDFs?

Yes! After uploading your files, the thumbnail preview lets you see every page from all source documents. You can drag individual pages to any position, regardless of which file they came from. This is perfect for interleaving pages, inserting appendices at specific locations, or creating a custom compilation from multiple sources.

Are my files uploaded to a server when I merge them?

No, your files never leave your device. Unlike cloud-based PDF tools that upload your documents to remote servers for processing, our merger runs entirely in your browser using WebAssembly technology. This means confidential documents, legal contracts, medical records, and financial statements stay completely private. There's no data transmission, no server storage, and no privacy concerns.

Merge PDF

How To Merge PDF Online for Free

Upload Your PDFs

Drag and drop multiple PDF files onto the upload area, or click to browse and select them from your device. Add as many files as you need.

Arrange and Preview

View thumbnail previews of all pages. Drag files or individual pages to reorder them. Remove any pages you don't want in the final document.

Download Your Merged PDF

Click the merge button and your combined PDF downloads automatically. The entire process happens in your browser with no waiting for server processing.

Combine multiple PDF files into a single, unified document without uploading anything to the cloud. Whether you're assembling a report from separate chapters, consolidating invoices for accounting, or creating a portfolio from individual project files, our browser-based PDF merger handles it all. The entire process runs locally on your device using WebAssembly technology, which means your confidential contracts, financial statements, and sensitive documents never leave your computer. Simply drag and drop your files, rearrange them in any order using the visual thumbnail interface, and download your merged PDF in seconds.

Everything You Need in a Merge PDF

Drag and drop

Drag and drop interface with visual file reordering before merging

Full-page thumbnail preview

Full-page thumbnail preview to verify content and sequence

Merge unlimited PDFs

Merge unlimited PDFs of any size in a single operation

Preserves all bookmarks,

Preserves all bookmarks, hyperlinks, and table of contents

Maintains original image

Maintains original image resolution and vector graphic quality

Keeps embedded fonts

Keeps embedded fonts and text searchability intact

Frequently Asked Questions

Document Work Made Easy

Process your PDFs with our collection of free, privacy-first tools. No uploads to servers, no registration required. Everything runs directly in your browser.