OneUtil

什么是 OneUtil？

22 developer tools in one keyboard-first app — JSON editor, PDF toolkit, JWT decoder, regex tester, hash, QR, cron, color, diagrams, converters. Everything runs 100% in your browser: no backend, no accounts, no uploads. Your data never leaves the tab, and the whole suite keeps working offline (only live currency rates need a network, and it says so). Depth over count: JSON Schema validation, realdocx + text PDF export, ReDoS-safe regex, diagrams that sync text and canvas both ways. Free.