Note You can use GroupDocs.Parser without the license. The usage and functionalities are pretty much same as the licensed one but you will face few limitations while using the non-licensed API. Evaluation Limitations You can easily download GroupDocs.Parser for evaluation. The evaluation download is the same as the purchased download. The evaluation version simply becomes licensed when you add a few lines of code to apply the license. You will face following limitations while using the API without the license: API Limit Only 100 files per session Only 5 pages (slides, sheets) of a document Text extraction Only 20 lines per fileOnly the first 1600 symbols Only the first 5 pages (slides, sheets)+ Evaluation marks Formatted text and text structure extraction Only 20 rows for spreadsheetsOnly the first 1600 symbolsOnly the first 5 pages (slides, sheets)+ Evaluation marks Metadata extraction Only 5 properties per file Licensing The license file contains details such as the product name, number of developers it is licensed to, subscription expiry date and so on....Signature Product Solution GroupDocs...so on. It contains the digital signature, so don’t modify the file...