Merge PDF Online

Combine multiple PDF files into one document. Drag to reorder files, preview before merging, and control page size, orientation, and scaling.

Why merge PDF files?

  • Combine multiple documents into a single PDF for easy sharing

  • Merge contracts, invoices, or reports into one file

  • Join scanned pages into a complete document

  • Reduce the number of attachments in emails

  • Organize chapters or sections into a single PDF

  • Prepare a complete portfolio or presentation from separate files

How to merge PDF files in 3 steps

Upload your PDF files
Drag and drop your PDF files or select them from your device. Upload as many files as you need.
Arrange and configure
Drag files to set the order, preview any file before merging, and choose page size settings in the sidebar.
Download the merged PDF
Click Merge and save the combined PDF file to your device.

What you can do with the PDF merger

Drag and drop to reorder

Arrange your PDF files in any order before merging. Simply drag files to change their position in the final document.

Preview before merging

Click any file to open a full preview before combining. Check the content of each PDF without opening a separate application.

Original page size

Keep each page at its original size and dimensions. Ideal for merging documents that already have the correct formatting.

Preset page formats

Normalize all pages to a standard size: A4, A3, Letter, or Legal, in portrait or landscape orientation.

Custom page size

Set a specific page width and height in millimeters for the merged PDF output.

Fit, stretch, or keep content size

Control how content is placed when changing page size: fit to page with proportions preserved, stretch to fill, or keep the original content size and position with anchor control.

Who uses PDF merging?

Office and business teams

Combine contracts, invoices, reports, and supporting documents into a single PDF file for sending to clients or archiving.

Students and researchers

Merge lecture notes, article excerpts, and reference materials into one organized PDF for studying or submitting assignments.

Legal professionals

Combine case documents, evidence files, and correspondence into a single PDF for court submissions or client files.

Designers and creatives

Merge portfolio pages, mood boards, or presentation slides into one document with full control over page size and orientation.

Finance and accounting teams

Combine statements, receipts, and financial reports into a single organized PDF for auditing or record keeping.

HR and admin staff

Merge employee documents, forms, and onboarding materials into a single PDF file for record management and distribution.

Why choose us

We ensure quality, convenience, and support for all formats.

High-quality conversion
High-quality conversion
We guarantee precise file conversion without any loss of quality.
Support for multiple formats
Support for multiple formats
You can convert your files from over 200 different formats, including images, documents, and more.
Compatible with all devices
Compatible with all devices
Convert files from any device – whether it's a computer, tablet, or smartphone.
User-friendly interface
User-friendly interface
Our service is designed to make conversion easy for everyone in just a few simple steps.
Full data security
Full data security
All files are transmitted and stored using advanced encryption technologies.
High-speed processing
High-speed processing
Thanks to cloud technology, we ensure fast processing even for large files.

More PDF merge tools

Choose a merge flow that matches your files and use case.

Merge PDF and Images

Combine PDF files with JPG, PNG, WEBP, GIF, TIFF, and BMP images into one PDF.

Merge PDF for Email Attachments

Prepare one clean PDF from multiple attachments before sending documents by email.

Frequently Asked Questions

You can upload and merge multiple PDF files in a single session. All files are combined in the order you arrange them.

Yes. Drag and drop files to arrange them in any order before starting the merge.

You can keep each page at its original size, normalize all pages to a standard preset such as A4, A3, Letter, or Legal, or set a custom size in millimeters.

Fit scales the content proportionally to fit the target page size. Stretch scales it to fill the page exactly, which may distort content. None keeps the original content size and positions it according to the anchor setting.

When using Fit or None mode, the anchor controls where the content is placed on the page, for example centered, top-left, or bottom-right.

Files are processed automatically during conversion. For sensitive documents, review your organization's privacy requirements before uploading.

About PDF Merging

What a PDF merger is used for

Merging PDF files is a common document task for business, study, and personal workflows. You might need to combine contracts, invoices, scanned pages, reports, or portfolio pages into a single file that is easier to share, archive, or print.

An online PDF merger makes this possible directly in the browser without installing desktop software. Instead of sending several attachments or managing separate files, you can create one clean PDF document.

Why file order and preview matter

A useful PDF merger should do more than just join files together. It should also help you control the structure of the final document.

In this tool, you can upload multiple PDFs, change their order with drag and drop, preview each file before processing, and export one combined PDF in the exact sequence you need.

How page size settings help

Page size control is the main feature that makes merging more flexible. If your source files already use the same layout, you can keep the original page dimensions.

If the files do not match, you can normalize everything to a preset such as A4, A3, Letter, or Legal, or enter a custom page size in millimeters for printing and specialized layouts.

Fit, Stretch, None, and anchor positioning

Resize mode defines how page content behaves after the target size changes. Fit keeps the original proportions and places the content neatly within the page. Stretch fills the entire page but may distort the layout. None keeps the original content size, which is useful when you want positioning control without scaling.

Anchor settings help place content precisely on the page when using Fit or None mode. You can align pages to the center, corners, or edges, which is useful when combining documents with different source sizes into a consistent final layout.

Reducing mistakes before download

Previewing files before merging reduces mistakes. You can quickly confirm that each PDF is the correct version, check page order, and then download one final merged document with more confidence.