DevToolbox

About

A collection of 51 developer utilities that operate completely within your browser, including a JSON Formatter, JWT Decoder, Regex Tester, Base64 tool, UUID Generator, Hash Generator, Cron Builder, SQL Formatter, and 43 others. Every tool is privacy focused and runs 100% client side. You can safely paste API keys, JWT tokens, or private configurations, as no data is ever sent to a server. Each utility features keyboard shortcuts, one click example data, and input history. There is no account required, no sign up process, and absolutely no advertisements within the tool interface.