Synopsys (SNPS) S-8 Registration of securities for employees

Exhibit 23.1

Consent of Independent Registered Public Accounting Firm

The Board of Directors

Synopsys, Inc.:

We consent to the use of our report dated December 9, 2016, with respect to the consolidated financial statements and the effectiveness of internal control over financial reporting, incorporated herein by reference.

/s/ KPMG LLP

Santa Clara, California

April 6, 2017