OneZeroToys packs 40+ utilities developers and power users reach for daily into a single, fast, native Windows app. No cloud sync. No accounts. No subscriptions. Just a focused toolbox that runs entirely on your PC. PRODUCTIVITY • Kanban boards with priorities, due dates, and rich task descriptions • Todo lists with active/completed grouping • Dual-pane file explorer • Markdown editor EDITORS • Multi-language text editor with syntax highlighting — C#, F#, JS/TS, HTML, CSS, JSON, XML, YAML, Markdown, SQL, Python, Rust, Go, Java, C/C++, PHP • Text diff with side-by-side and inline modes • Configurable font, size, and word wrap CONVERTERS • JSON ↔ YAML, JSON ↔ XML • Date/Time, RGB ↔ Hex, Number Base ENCODERS / DECODERS • Base64 (text and file), URL, HTML • JWT encode/decode with full header, payload, and signature parsing GENERATORS • Hash, UUID, QR Code, Lorem Ipsum, Password VALIDATORS • JSON Schema, XML Schema TOOLS • Regex tester with real-time matching • XPath and JSONPath testers • Cron parser with next-execution preview • PDF and image compression Everything runs locally. Your code, tokens, and files never leave your machine.