How can I access volumes encrypted with LUKS/dm-crypt from Windows?

LibreCrypt (formerly DoxBox, itself formerly FreeOTFE) offers LUKS-compatible disk encryption for Windows. It will also open legacy FreeOTFE volumes.

WSL 2 on Windows10

Windows allows now to mount physical disks using the Windows Subsystem for Linux 2 (WSL).

For people who are not familiar with WSL2:

... Windows Subsystem for Linux is a compatibility layer for running Linux binary executables natively on Windows 10 and Windows Server 2019. In May 2019, WSL 2 was announced, introducing important changes such as a real Linux kernel, through a subset of Hyper-V features. ...

find more on Wikipedia

The Windows 10 WSL2 now supports a mount command for linux filesystems called wsl.

First of all you have to install WSL2 on your windows10+ release. I recommend to simply follow the microsoft installation guide.

Now you can use apt commands as common on ubuntu/debian systems

sudo apt install cryptsetup

and use thecryptsetup luksOpen command.

Previous WSL didn't support CRYPT, and you had to recompile the kernel. To check if DM_CRYPT is supported on your system, open a wsl2 terminal and type the following command:

cat /proc/config.gz | gunzip | grep CONFIG_DM_CRYPT

The output should be CONFIG_DM_CRYPT=y without a hash (# ), and =y should be set.