How to merge multiple PDFs into one?

Use our "Merge PDFs" tool: select your files, drag to reorder, and click Process. Everything is done in your browser — no files are uploaded to any server.

How to compress a PDF without losing quality?

Our compression tool automatically reduces PDF file size while maintaining visual quality. Simply upload your file and download the result.

How to unlock a password-protected PDF?

Upload the protected PDF to our "Unlock PDF" tool. If the file only has copy/print restrictions, removal is automatic. For open passwords, you'll need to enter the password.

Is it safe to use online PDF tools?

Yes! At Unlocked PDF, all files are processed locally in your browser using WebAssembly. No files are ever sent to our servers.

Can I convert images to PDF for free?

Yes, our "Image to PDF" tool converts JPG, PNG, and WebP into multi-page PDF documents, completely free.

Is it safe to merge PDFs online?

Yes. All files are processed locally in your browser. No data is sent to external servers.

How many PDFs can I merge at once?

There is no limit. Select as many files as you need and combine them into one document.

Does merging affect PDF quality?

No. The tool preserves the original resolution, fonts, and formatting of each file.

Can I reorder PDFs before merging?

Yes. Simply drag and drop files into your preferred order before processing.

Do I need to install any software?

No. The tool works 100% online in your browser with no downloads or sign-up required.

Merge PDF Files

Combine multiple PDF documents into a single file quickly and securely. Drag, reorder, and merge your PDFs without uploading anything — everything happens in your browser.

About This Tool

Merge multiple PDF files into a single document quickly and for free. Our online tool lets you combine PDFs with no size limit while preserving original quality. All processing happens in your browser — your files never leave your computer.

Related Tools

Split PDF

Extract specific pages or split a large PDF file into several smaller ones.

Organize PDF

Reorganize, rotate, or delete pages from your PDF with ease.

Compress PDF

Drastically reduce PDF file size while maintaining visual quality.

Rotate PDF

Rotate your PDF pages to the correct orientation (portrait or landscape).