📑 Combine PDFs • 100% In-Browser • Zero Server Uploads

Merge PDF Online Free

Combine multiple PDF files into one unified document with drag-and-drop file reordering, individual page management, and strict structural validation.

Drop PDF files here, or browse files

Select 2 or more PDFs. 100% private — your files never leave your device.

Documents to Merge 0 Documents 0 Pages 0 B

Tip: The merged PDF will follow the exact sequence shown above (1, 2, 3...). Use the Up/Down buttons or sort dropdown to rearrange.

Merge Configuration & Output Options

Customize page scaling, bookmarks, interleaving, and document metadata.

Merge Sequence:

Sequential Merge (Doc 1 → Doc 2 → Doc 3) Interleave Pages (A1, B1, A2, B2...)

Advanced Page Normalization, Bookmarks & Metadata

Page Size Handling

Orientation Normalization

Bookmarks / Table of Contents

Metadata Handling

Preserve Custom Remove

Protect Merged PDF with Password

Output Filename:

How to Merge PDF Files Online in 3 Simple Steps

Select or Drop PDFs

Upload two or more PDF documents. Add more files anytime or replace uploaded files.

Reorder & Customize

Rearrange document sequence, open the Page Organizer to rotate or delete specific pages, and set page sizes.

Merge & Download

Click Merge. Our engine validates page count and document structure before delivering the instant download.

Frequently Asked Questions (FAQ)

Will merging PDFs reduce document clarity or image quality?

No. By default, our merger performs a 100% lossless structural merge. Original vector graphics, fonts, hyperlinks, bookmarks, and high-resolution images are preserved without re-compression or rasterization.

Can I merge only selected pages from different PDF files?

Yes! Click the Pages button on any document card to open the visual Page Organizer. You can select specific pages, apply page ranges (e.g. 1-5, 8), filter odd/even pages, rotate orientation, or delete unwanted pages.

What is Interleave Mode and when should I use it?

Interleave mode alternates pages between two documents ($A_1, B_1, A_2, B_2 \dots$). This is useful when you have scanned front pages in one PDF and back pages in another PDF and want them collated into their correct reading order.

How does IMGFixy protect document privacy?

Your files are 100% processed locally inside your browser using WebAssembly and client-side JavaScript. Your confidential files are never uploaded to any remote server or stored in any database.