Free online tool
Free Online PDF Merger — Combine PDFs in Your Browser
Merge multiple PDF files into a single document online. Free, no signup, no upload — 100% client-side processing. Your files never leave your browser.
01How it works
Upload your PDFs
Drop two or more PDF files into the upload area or click to browse. Reorder them using the up/down arrows.
Click Merge
All files are combined in order entirely within your browser using the pdf-lib library. No data leaves your device.
Download the result
Click Download to save the merged PDF. The file is ready instantly — no email, no account required.
FAQ
Frequently asked questions
Is there a limit to how many PDFs I can merge?
You can merge any number of PDFs as long as each file is under 50 MB. All processing happens in your browser, so your only limit is your device's available memory.
Will bookmarks and form fields be preserved?
Bookmarks are preserved. Form fields are copied but may lose interactivity depending on the source PDF. For complex forms, try anyrow's AI extraction.
Can I reorder the PDFs before merging?
Yes — use the up and down arrows next to each file in the list to change the order before merging.
Are my files uploaded to your server?
No. This tool runs 100% client-side via the pdf-lib library. Your files never leave your browser — you can verify this by opening DevTools → Network tab while you merge.
Need AI-powered document extraction?
This tool uses client-side processing. anyrow uses AI to extract structured data from PDFs, images, and scanned documents with 99% accuracy. 150 free extractions/month — no credit card required.