WhetKit, a Pocketful of Browser-Local Tools

Field notes

The collection is divided into seven named categories, with Text containing 18 tools and Encoding, Data, Web, and Developer containing 12 each. Featured utilities cover both ordinary chores—case conversion, word counting, JSON formatting, and timestamp conversion—and more technical work such as HMAC generation, regex testing, cron-expression interpretation, and file checksums. The homepage states that pasted text and opened files remain in the page and are not sent to a server.