Papyrus is a tool for English Language Teaching material authors and editors which automatically evaluates the reading difficutly of English texts and classifies them in a CEFR level. Its main features are:
CEFR readability classifier
Word replacement recommendations
Topic classifier
Keyword extraction
Part-of-speech tagger
The beta version can be accessed free of charge.
: Free of charge
Helpdesk: https://papyrus.edia.nl/support
Documentation: API Documentation
