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Free offline PDF toolkit for Windows - merge, split, watermark, lock
...Available as a per-user installer that needs no admin rights, or as a single portable executable you can run from a USB stick. No bundled offers, no telemetry, no account. 100% free, no Pro tier, free to use at home and at work.
Built on .NET 8 and Avalonia. Requires Windows10 or later, 64-bit.
It is a Windows library that merges standard PDFs into a final PDF
The library is intended for developers, for inclusion in desktop applications or server services.
There are lots of SDKs on the market creating (merging) PDFs (almost all of them have limitations).
Our Windows library (MergePDFByNMI.dll) only merges standard PDF files (there are several PDF formats).
You can send the input PDFs (by file name or by byte array) and you can have the final PDF (saved on a file or get back on a byte array).
The library calls can be synchronous...