OAK is free to try

To get started with OAK, download it from this web page and install it on your computer. It will function for 30 days from installation. It’s the full thing, not restricted in any way.

Have you already evaluated OAK 4.0-4.3?

Even if you have already evaluated OAK 4.0-4.3, the current version 4.4 will provide another 30 day evaluation period.

Do you already have a license for OAK 4.0-4.3?

If you already have a license for OAK 4.0 to 4.3, you do not need to buy a new one to use this version. However, OAK 4.4 no longer supports the license keys used in 4.0-4.2, so in that case you will need to exchange your old license key for a serial number.


OAK is packaged as a single .msi file.

Excel 2007-2016 32-bit and 64-bitDownload OAK23 MB

The installer does not install any of OAK’s prerequisites, as we believe it is unlikely they are not already installed. These prerequisites are listed here: OAK Prerequisites.