ToolPDFsMerge PDF
Upload multiple PDFs, arrange them in the order you want, and download one merged file.
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How it works
Merging PDF files is one of the most common document tasks. Whether you are assembling a report from multiple sections, combining scanned pages, or joining contract appendices, having all the content in one file makes sharing and archiving far easier.
ToolPDFs Merge PDF tool combines your files entirely inside your browser using the pdf-lib library. There is no server involved at any step. Upload two or more PDFs, review the order in the file list, and click the download button. The merged PDF preserves all original pages, text, images, and formatting from every source document.
The tool is free to use with no account, no email confirmation, and files up to 25 MB. It works on any modern browser including Safari on iPhone and iPad, Chrome on Android, Firefox, and Edge on desktop.
Features
- Combines any number of PDF files into one document without a server upload.
- Drag uploaded files into the exact order you want before merging.
- Runs entirely in your browser using pdf-lib. Your files stay on your device.
- Works on iPhone, iPad, Android, and all major desktop browsers.
- Free with no account required, files up to 25 MB, and 20 operations every day.
Frequently asked questions
Are my PDF files uploaded to a server?
No. Merging happens entirely in your browser using the pdf-lib library. Your files never leave your device, so sensitive documents stay completely private.
Is there a limit to how many PDFs I can merge?
Free files can be up to 25 MB each. Pro removes the file size limit. You can combine multiple PDFs in one merge on either plan.
Can I change the order of the PDFs before merging?
Yes. Files are merged in the order they appear in the list. Remove a file and re-add it to change its position.
Does this work on iPhone?
Yes. Merge PDF works in Safari, Chrome, and Firefox on iPhone and iPad.
Is the merged PDF compatible with Adobe Acrobat?
Yes. The output is a standard PDF file compatible with Adobe Acrobat, Preview on Mac, Google Drive, and any other PDF viewer.