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Floating-User License

A Floating-User License allows users to use a Keil software product on multiple computers. Floating-User Licenses are available for most Keil products.

Floating-User Licenses require a file server that hosts a Floating-License-File (*.FLF). The system administrator has to create the file through the dialog Floating License Administrator prior to using the product.

For PK51, PK166, and PK251 toolchains, licenses are lingered for one hour. For MDK Editions, the one hour linger time gets reset at the end of a build or debug session.

After the Keil software has been installed, license the product by registering your CID and Floating License Code on the Keil website.

Once you have installed a Floating-User License on a workstation you may:


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Acquisition of ARM Holdings plc. by SoftBank Group Corp.

We are pleased to inform you that on 5 September 2016, SoftBank Group Corp. acquired ARM Holdings Plc. ARM will continue to operate as an independent business within the SoftBank group.

Any current agreements between ARM Ltd (or other ARM group companies, as applicable) you / your company remain in effect as between the parties, and the parties will continue to be bound by and perform the obligations in such agreements. If you have any queries please direct these to