How do I merge PDF files online for free?

Open the CoolUtils online PDF merger, upload the PDF files you want to combine, arrange them in the desired order, and click Combine My Files. The tool merges all selected PDFs into a single document in seconds and provides a download link for the result.

Is the online PDF merger really free?

Yes. CoolUtils online PDF merger is completely free — no subscription, no registration, and no software installation required. Simply upload your files and merge PDF documents online at no cost.

How many PDF files can I merge at once?

The online form takes up to five files per pass. Need more? Merge the first five, then combine the result with the next batch — or use the desktop PDF Combine, which joins hundreds of files and whole folders in one run.

Can I merge JPG or PNG images together with my PDFs?

Yes. The upload slots accept JPG, PNG, and GIF images alongside PDF files. Each image becomes a page in the merged document, so you can join a scanned contract in PDF with photographed annexes into one file.

How do I set the order of the merged pages?

The files are joined in the order of the upload slots: the document in the first slot opens the merged PDF, the second follows it, and so on. Place your cover or main document in slot one and the attachments after it.

How do I combine PDF files without Adobe Acrobat?

Use this page — the merger runs in the browser, so no Acrobat, no Word, and no installed software of any kind is required. For folder-level merging with bookmarks, a table of contents, or a cover page, the desktop PDF Combine does it offline.

Is there a file size limit?

The online service accepts files up to 50 MB each — enough for most scanned and generated documents. For oversized files or bulk jobs, the desktop PDF Combine has no size limit and keeps everything on your computer.

Is it safe to upload PDF files to an online merger?

CoolUtils processes all uploaded files securely. Documents are used solely for the conversion operation and are not stored or shared. The online PDF merger does not require any account creation or personal data.

Does the online PDF merger work on mobile and Mac?

Yes. The online PDF merger runs in any modern browser on Windows, Mac, Linux, iOS, and Android. No installation or plugins are needed — open the page and merge PDF files online from any device.

Online PDF Merger: Combine Multiple PDF Files for Free

The free online PDF merger that combines multiple documents into one file in seconds — no software, no sign-up.

Upload your documents, set the order, and merge them with a single click — files are processed on our servers and not stored afterward.

Quick answer: To combine PDF files online free, upload up to five PDFs (or JPG and PNG images) to CoolUtils' merger above, arrange them across the upload slots in the order you need, and click Combine My Files. The merged PDF downloads in seconds — no installation, no signup, and files are not stored after processing.

How to Merge PDF Files Online — 3 Simple Steps

1) Select the PDF files to combine

Free PDF Merger Online: No Installation or Sign-Up Required

CoolUtils online PDF merger requires no software to download, no account to create, and no email address. Upload your PDF files, click Combine My Files, and download the result — the entire process takes seconds. The tool works on Windows, Mac, Linux, iOS, and Android, and the uploaded documents are used only for the merge and not stored afterward.

Merge PDF and Images into One PDF

The upload slots accept more than PDF: JPG, PNG, and GIF images go straight into the merge, each becoming a page of the final document. That covers the everyday mix — a contract in PDF plus photographed annexes, a report plus screenshot exhibits, a scanned form plus a picture of a receipt — without converting the images first. If your mix also includes Word or Excel files, the desktop PDF Combine Pro merges PDF, DOC, XLS, TIFF, and JPEG into one PDF in a single run.

How the File Order Works

The merged document follows the upload slots from top to bottom: the file in the first slot opens the combined PDF, the second continues it, and so on. Put the cover or the main document in slot one and the attachments below. Need more than five files in one document? Merge the first five, then combine the result with the next batch — or hand the whole folder to the desktop version.

When Do You Need to Merge PDF Files?

Contracts with annexes: the agreement and its appendices travel and get signed as one document
Scanned pages: single-page scans from a phone or a flatbed become one readable file instead of a folder of fragments
Applications and case files: forms, certificates, and receipts submitted as the single PDF that portals expect
Reports: the write-up, the data pages, and the picture exhibits joined for review and printing
Invoices and receipts: a month of billing collected into one archive-ready document

Online PDF Combiner vs Desktop PDF Combine

Feature	Online (this page)	Desktop PDF Combine
Files per run	Up to 5	Hundreds, whole folders
File size limit	50 MB each	No limit
Bookmarks, table of contents, cover page	—	Yes
Merge JPG/PNG images in	Yes	Yes (Pro also adds DOC, XLS, TIFF)
Command-line automation	—	Yes (.bat, scheduler)
Privacy	Files uploaded, not stored	Everything stays on your computer
Price	Free	From $59.90, 30-day free trial

For a one-off merge of a few documents, this page is the fastest route. For recurring work — combining folders of statements, adding a clickable table of contents, stamping a cover page, or scripting nightly merge jobs — the desktop PDF Combine does it offline, and your files never leave the machine.

Frequently Asked Questions About the Online PDF Merger

How do I merge PDF files online for free?: Open the CoolUtils online PDF merger, upload the PDF files you want to combine, arrange them in the desired order, and click Combine My Files. The tool merges all selected PDFs into a single document in seconds and provides a download link for the result.
Is the online PDF merger really free?: Yes. CoolUtils online PDF merger is completely free — no subscription, no registration, and no software installation required. Simply upload your files and merge PDF documents online at no cost.
How many PDF files can I merge at once?: The online form takes up to five files per pass. Need more? Merge the first five, then combine the result with the next batch — or use the desktop PDF Combine, which joins hundreds of files and whole folders in one run.
Can I merge JPG or PNG images together with my PDFs?: Yes. The upload slots accept JPG, PNG, and GIF images alongside PDF files. Each image becomes a page in the merged document, so you can join a scanned contract in PDF with photographed annexes into one file.
How do I set the order of the merged pages?: The files are joined in the order of the upload slots: the document in the first slot opens the merged PDF, the second follows it, and so on. Place your cover or main document in slot one and the attachments after it.
How do I combine PDF files without Adobe Acrobat?: Use this page — the merger runs in the browser, so no Acrobat, no Word, and no installed software of any kind is required. For folder-level merging with bookmarks, a table of contents, or a cover page, the desktop PDF Combine does it offline.
Is there a file size limit?: The online service accepts files up to 50 MB each — enough for most scanned and generated documents. For oversized files or bulk jobs, the desktop PDF Combine has no size limit and keeps everything on your computer.
Is it safe to upload PDF files to an online merger?: CoolUtils processes all uploaded files securely. Documents are used solely for the conversion operation and are not stored or shared. The online PDF merger does not require any account creation or personal data.
Does the online PDF merger work on mobile and Mac?: Yes. The online PDF merger runs in any modern browser on Windows, Mac, Linux, iOS, and Android. No installation or plugins are needed — open the page and merge PDF files online from any device.