Merge PDF
Drop in two or more PDF files and download a single merged PDF. Pages from each document are appended in the exact order you uploaded the files, with the original page sizes, orientations and content preserved. Everything happens locally in your browser — your documents are never uploaded to a server.
Drop .pdf files here
or click to choose
Privacy
Runs entirely in your browser — nothing is sent to any server.
Cost
Free. No sign-up, no watermark.
Supports
.pdf → .pdf
Related tools
Tools that work with the same formats — most users open one of these next.
Rotate PDF Pages
Rotate selected pages of a PDF by 90, 180 or 270 degrees — in your browser.
Delete PDF Pages
Remove specific pages or ranges from a PDF — in your browser, with no upload.
Extract PDF Pages
Pull selected pages out of a PDF into a new, smaller PDF — entirely in your browser.
Reorder PDF Pages
Rearrange the pages of a PDF into any order — all in your browser, no upload.
Add Watermark to PDF
Stamp a text watermark across every page of a PDF — in your browser, no upload.
Add Page Numbers to PDF
Stamp page numbers onto a PDF — pick position, format and start number, all in your browser.
Frequently asked
Is Merge PDF free to use?
Yes. Merge PDF is completely free with no sign-up, no watermark, and no usage limits. Toolsly does not charge for any of its tools.
Do my files and data stay private?
Yes — Merge PDF runs entirely in your browser using your device's CPU. Files and text are never uploaded to our servers, so your data stays private.
How does Merge PDF work?
Open Merge PDF, drop in your PDF file, choose any options, and click Convert. Your browser does the work locally and produces a PDF file you can save right away.
What's the maximum file size for Merge PDF?
Because Merge PDF runs in your browser, the maximum size depends on your device's available memory. Most modern phones and laptops handle files up to a few hundred MB without issues.