Free CLAWS WWW tagger

CLAWS POS tagger | Obtaining a licence | Tagging service

WWW tagger

Our free web tagging service offers access to the latest version of the tagger, CLAWS4, which was used to POS tag c.100 million words of the British National Corpus. You can choose to have output in either the smaller C5 tagset or the larger C7 tagset.

Submitting text

If you would like to use our free WWW tagger, please complete the form below. You can enter up to 100,000 words of English running text. If you enter more, it will be cut off at the word limit. To run the full amount, you will need a fast internet connection. Input format guidelines are available. To tag the text you have entered click the button below the form.

Select tagset: C5 C7

Select output style: Horizontal Vertical Pseudo-XML

This free service is not intended for extremely large numbers of repeated submissions from the same site. Our tagging service and CLAWS licences are available if you have hundreds of millions of words to tag. Please contact Paul Rayson (email:, also use this address if you have technical problems.