Explain how Portia saved Antonio's life?

Portia acted as Antonio's lawyer, successfully turning Shylock's deal with Antonio back on him..... In, the end, had Shylock insisted upon his pound of flesh, his own punishment would have been just as great.

Portia saves Antonios life by:

When Portia hears that Antonio is in trouble she first tells Bassanio and his friends to go to the court and then later goes with Nerissa and they both dress up as lawyers and even write a fake letter saying that the real lawyer cant come today because he is sick.

When they both go there, Portia uses her clever wit to save Antonio. she says that sure, the words are "a pound of flesh" but she analyzes the bond and quickly finds out that there is blood written so she uses that as a advantage against Shylock and wins the case.