EntraPT is a web-based application for elastic geobarometry freely accessible at the “Fiorenzo Mazzi” experimental mineralogy lab website (www.mineralogylab.com/software). It provides an easy-to-use tool to calculate inclusion pressures with error propagation from the residual strain measured in mineral inclusions. EntraPT establishes a method and a workflow to import and analyze the measured residual strains, correctly calculate the mean stress in the inclusions, compute the entrapment isomekes with uncertainty estimation, and visualize all the results in relevant graphs. It enables the many possible errors arising from manual handling of the data and from the numerous steps required in geobarometry calculations to be avoided. All of the data, parameters and settings are stored in a consistent format and can be exported as project files and spreadsheets, and imported back to EntraPT for further analysis. This allows researchers to store and/or share their data easily, making the checking and the comparison of data and results reliable. EntraPT is an online tool that does not require any download and/or installation, and it will be updated in the future with new functionalities made available from advances in the development of elastic geobarometry.