Merge PDF

Drop in your PDFs, arrange them, and download a single merged file. Everything happens in your browser.

Drop your file here

Select file

Accepted: PDF

Page size

Free · No sign-up · Files never leave your device for most tools

This tool runs entirely in your browser — your file is never uploaded.

How it works

Upload

Adjust

Download

Frequently asked

Is Merge PDF free?

Yes. Merge PDF is completely free with no sign-up, no watermark and no daily limit. There is no paid tier — every tool on iAdorePDF is free to use as often as you like.

Is Merge PDF safe and private?

Yes. Merge PDF runs entirely inside your browser, so your file is never uploaded to any server. Nothing leaves your device, which makes it safe for confidential documents.

Do I need to install any software?

No. Merge PDF works in any modern browser — Chrome, Safari, Firefox or Edge. There is nothing to download and no account to create.

Does Merge PDF work on a phone?

Yes. Merge PDF is built mobile-first and works on iPhone and Android exactly as it does on a computer, straight from the browser.

Can I choose the order of the merged PDFs?

Yes. After you add your files, drag the cards into any order or use the up and down arrows. The merged PDF follows exactly the order shown on screen, and you can also force every page to A4 or Letter.

How do I use Merge PDF?

Open the page, drop your file into the upload box (or tap Select file), choose your options, then press the start button. Your result downloads straight to your device.

Is there a file size limit?

There is no server limit because the work happens on your own device. The practical ceiling is your device memory; files up to about 100 MB are comfortable on most phones and much larger on a computer.

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