libdvdcss (or libdvdcss2 in some repositories) is a free and open-source software library for accessing and unscrambling DVDs encrypted with the Content Scramble System (CSS).

[citation needed] Many Linux distributions do not contain libdvdcss (for example, Debian, Ubuntu, Fedora and openSUSE) due to fears of running afoul of DMCA-style laws, but they often provide the tools to let the user install it themselves.

Libdvdcss is optional in many open-source DVD players, but without it, only non-encrypted discs will play.

[citation needed] Using HandBrake or VidCoder for DVD ripping requires that one install libdvdcss (with compilation[7] or Homebrew on macOS).

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