Merge PDF Files
Combine multiple PDF documents into a single organized file in seconds.
About this tool
Combine multiple PDF documents into a single cohesive file without installing software or waiting for server uploads.
How to use this tool
- Select or drag & drop the PDF files you want to merge.
- Rearrange the page cards in your preferred reading order.
- Click the Merge PDF button to compile your single combined document.
- Download your merged PDF file instantly.
How it works
Tool Fly processes your PDF files directly in your browser using pdf-lib. Your files are merged in memory and are not sent to us.
When to use this tool
- Students combining assignment covers, report bodies, and appendices.
- Professionals assembling contracts, invoices, and signed addenda.
- Freelancers consolidating multiple project briefs into a single submission.
Frequently asked questions
Is there a limit on how many PDFs I can merge?
You can merge up to 200 PDF files at once with a cumulative batch limit of 100MB.
Are my private files uploaded to your servers?
No. The files are combined in your browser, and nothing is uploaded.
Will the merged file keep the order I set?
Yes. You can drag the files into the order you want before merging, and the output keeps that order.
Can I merge a password-protected PDF?
No. A locked file has to be unlocked first, because the tool cannot read the pages of a protected document.
Limitations
Encrypted PDFs require unlocking before merging. Batch limit is 100MB.
Privacy
The work happens in your browser, and the input is not sent to us.