Launching Monday, December 14, 2026
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About
MJJ Tools offers 160+ free online calculators, converters, generators, and browser utilities. Tools cover developer tasks, math, finance, translation, text processing, security, image conversion, SEO, and everyday calculations.
Developer utilities include a JSON formatter and validator, Base64 encoder and decoder, regex tester, UUID generator, and data converters.
No registration or download is required. Most tools process input directly in the browser, with a focus on privacy and ease of use.