Sentencing the killers, Mr Justice Sweeney said Lee Rigby "had done absolutely nothing to deserve what you went on to do to him."
Mr Justice Sweeney added: "It is no exaggeration to say that what the two of you did resulted in a bloodbath."
Adebolajo tried to behead the soldier while Adebowale stabbed him in the chest.
"You both gloried in what you had done," the judge told the court, and said it had a "severe and lasting impact" on his loved ones.
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The 27-year-old, who cannot be named for legal reasons, is due to face trial in November.
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