Merge PDF
Combine multiple PDF files into one. Drag to reorder, rotate any file, then download. No upload, no watermark, no limits.
🔒 100% private — your files never leave your deviceDrop PDF files here
or click to choose files · add as many as you like
How it works
Drop in two or more PDFs and this tool stitches them into a single document using the pdf-lib engine, entirely inside your browser. You set the order by dragging the files or using the arrows, you can rotate any file by 90 degrees, and then you download the combined PDF. Nothing is sent to a server, so there is no upload wait and no privacy trade-off.
Why merge in the browser instead of a website that uploads
Most free PDF mergers send your files to their servers, cap how many you can do per day, or stamp a watermark unless you pay. That is a bad deal when the documents are contracts, tax forms, scanned IDs, or anything you would rather not hand to a third party. Here the work happens locally, which means it is faster, has no daily limit, and your documents stay on your machine.
Tips
Name your files in the order you want before dropping them in if you prefer, then fine-tune with the arrows. Use rotate for scans that came in sideways. If a file fails to load it is usually password protected, so remove the protection first and try again.
Are my PDFs uploaded anywhere?
No. Everything runs locally in your browser. Your files never touch a server, which is why it is instant and safe for sensitive documents.
Is there a file or page limit?
No sign-up and no hard limit. Very large merges are bounded only by your device's memory.
Can I reorder and rotate files?
Yes. Drag files to reorder, or use the up and down arrows, and rotate any file 90 degrees before merging.
Will there be a watermark?
No. The output is a clean PDF with no watermark and no added pages.
I build tools like this every day.
Senior full-stack engineer, available for senior or contract work, fully remote. See the rest of the lab or get in touch.