Merge PDF Files Online Free

PDF merging might seem straightforward - just stick files together, right? But anyone who's actually done this knows there are about a dozen ways it can go wrong. Pages end up out of order, file sizes balloon to unusable dimensions, or the merged PDF refuses to open in certain readers. Our PDF merger handles these edge cases properly. It combines your PDFs while maintaining quality, preserving bookmarks and links, and optimizing file size so you don't end up with a 200MB monster. The tool works with PDFs of different page sizes (mixing Letter and A4 is fine), different orientations (portrait and landscape together), and even password-protected files if you provide the passwords. What really matters with PDF merging is what happens behind the scenes - removing duplicate embedded fonts, consolidating repeated images, and properly handling PDF features like forms and annotations. We've seen too many "merged" PDFs that are just concatenated files with no optimization, resulting in bloated file sizes and broken features.

Select 2 or more PDF files to merge. Max 25MB per file.

How to Use Merge PDF

1

Upload PDF Files

Click the upload button and select multiple PDF files to merge. Add as many PDFs as needed.

2

Select File Order

Files will be merged in the order you select them. Make sure to select them in your preferred sequence.

3

Click Merge

Click the merge button to combine all PDFs into a single file. Processing typically takes just a few seconds.

4

Download Merged PDF

Download your merged PDF immediately after processing completes. All content and formatting is preserved.

Why Use Our Merge PDF?

Combine Unlimited PDFs

Merge as many PDF files as you need with no restrictions. Perfect for combining chapters, reports, invoices, or any document collection.

Easy File Selection

Simply select multiple files from your device. Files are merged in the order you select them.

Preserves All Content

Maintains all original formatting, images, hyperlinks, and bookmarks from source documents. Your merged PDF looks exactly as intended.

Fast Processing

Most merges complete in seconds, even for large files. No waiting around - combine your documents and continue working immediately.

Common Use Cases

Combine Reports

Merge multiple report sections, appendices, and cover pages into a single comprehensive document.

Create Portfolios

Combine samples of your work, certificates, and resumes into one professional portfolio PDF.

Organize Invoices

Merge monthly invoices or receipts into a single file for easier record-keeping and accounting.

Consolidate Scans

Combine multiple scanned documents into one cohesive PDF file for archiving or sharing.

Frequently Asked Questions

Is merging PDFs free?

Yes, you can merge unlimited PDF files completely free with no watermarks, no signup, and no hidden costs.

How many PDFs can I merge at once?

There's no limit to the number of PDF files you can merge. Upload as many documents as needed to create your combined PDF.

Will merging reduce PDF quality?

No. Merging PDFs combines files without any compression or quality reduction. All content, images, and formatting are preserved exactly as they appear in the original files.

Can I merge PDFs of different sizes?

Yes, you can merge PDFs with different page sizes. Each page retains its original dimensions in the merged document.

Are my files private?

Yes. All uploads are encrypted and files are automatically deleted from our servers after 24 hours. We never access or share your documents.

User Reviews

4.9
10 reviews
Alexander Scott
Dec 04, 2025

Love it! So simple to use yet so powerful. Results are always excellent.

Noah Collins
Nov 23, 2025

Best free tool I've found for this task. Clean interface and super fast.

Hannah Hill
Oct 25, 2025

Perfect! Exactly what I needed. Fast and reliable conversion every time.

William Carter
Sep 24, 2025

Perfect solution! I use this tool almost daily now. Highly recommended!

Justin Clark
Aug 20, 2025

Wow! Impressed by how well this works. Great quality and super fast processing.