Merge PDF
Combine multiple PDF files into one document in your browser.
PDFs are merged in your browser — nothing is uploaded.
Related Tools
What is Merge PDF?
PDF merging combines pages from multiple documents into a single file for sharing, printing, or archiving.
How to use
Upload two or more PDF files in the order you want.
Click Merge.
Download the combined PDF.
Benefits
- No file upload to server
- Merge many PDFs at once
- Pairs with Split PDF
Frequently Asked Questions
Can I change the page order?
Files are merged in the order you add them. Remove and re-add files to change order, or split and re-merge with Split PDF for page-level control.
Is there a file size limit?
Limits depend on your device memory. Very large PDFs may be slow in the browser — try merging fewer files at a time.
How many PDFs can I merge at once?
You need at least two PDFs. There is no fixed cap, but very large batches may slow down or run out of memory on low-end devices.
Are there file size limits?
Processing runs in your browser, so very large files may be slow or fail on low-memory devices. For best results, keep images under about 20 MB and PDFs under about 50–100 MB.
Is this tool free?
Yes. This tool is completely free to use with no sign-up, no limits, and no hidden fees.
Does my data leave my browser?
No. All processing happens entirely in your browser using client-side JavaScript. Your data is never sent to a server or stored anywhere.
Does this tool work on mobile?
Yes. PeasyDo tools work in modern mobile browsers on iOS and Android. For file tools, use a browser that supports file uploads and downloads.
Do I need to install software?
No. Everything runs in your browser — no desktop app, plugin, or account required.
Feedback & report a problem
Found a bug or have a suggestion? Let us know — it helps us improve this tool.
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