I built 12 free browser-based tools for developers — here's what I learned

Every developer has a list of tools they open daily. Password generators, JSON formatters, Base64 encoders. Most of them are fine — until you realize they're sending your data to a server you don't control. So I built ToolKit: a collection of free utilities that run entirely in your browser. What's in it Password Generator — Web Crypto API, never transmitted anywhere Word Counter — words, characters, reading time, keyword density JSON Formatter — prettify, minify, validate with error highlighting Base64 Encoder/Decoder — encode and decode with a swap button Case Converter — camelCase, PascalCase, snake_case, kebab-case, CONSTANT_CASE, Title Case, Sentence case, and more Color Palette Generator — 7 harmony modes: analogous, complementary, triadic, split-complementary, tetradic, monochromatic, random Lorem Ipsum Generator — by words, sentences, or paragraphs UUID Generator — v4, cryptographically random, generate up to 50 at once Hash Generator — SHA-1, SHA-256, SHA-384, SHA-512 via Web