Your entire developer toolbox, finally in one place. Fluent DevTools packs 125+ essential utilities into a single, fast, 100% offline Windows app. Convert data formats, generate code, encode and decode, secure your data, and create QR codes without ever opening a browser tab. Everything runs locally on your device, powered by the Monaco editor from VS Code. **🔀 Data Conversion & Formatting** Work with JSON, JSONC, JSONL, XML, YAML, CSV, TSV, TOML and TOON in one editor. Format, minify, validate and escape any format. Convert between them all, or export to HTML, Markdown and Base64. Explore documents as interactive trees and tables, generate JSON Schema from JSON or YAML, and build XSDs from XML. CSV and TSV support custom delimiters. **⚡ Instant Code Generation** Turn JSON or YAML into typed classes for C#, Java, TypeScript, Dart, Python, PHP, Go, Rust, C++, Swift or Kotlin. Paste a cURL command and get ready-to-use requests in 12 languages, including JavaScript, Ruby, Kotlin and Dart. **🔐 Encoders, Hashing & Encryption** Encode and decode Base64 (text and files), URL, HTML entities, Hex/ASCII and JWT tokens, plus a flexible backslash escape tool. Generate MD5, SHA-1, SHA-2, SHA-3 and RIPEMD-160 hashes with HMAC support. Encrypt and decrypt with modern AES-128/192/256 or ChaCha20, plus legacy 3DES and RC4 for old data. **🧰 Everyday Utilities** UUID and ULID generator, regex tester, cron parser with next-run previews, side-by-side diff viewer, color converter (HEX, RGB, HSL, HSV, CMYK), timestamp converter, age calculator, text case converter and lorem ipsum generator. **📱 QR Codes Made Simple** Create QR codes for text, URLs, email, SMS, phone numbers, Wi-Fi credentials, geo locations and calendar events. Export as PNG, SVG, BMP, PDF, ASCII, Base64 or PostScript/EPS. The built-in reader decodes QR codes and barcodes from images. **👀 Live Preview** Render HTML and Markdown side by side with your code and see updates as you type. **🖥️ Built for Windows** A native WinUI 3 app with Fluent design, light, dark and system themes, and the Monaco editor everywhere: syntax highlighting, code folding, find and replace, and multi-cursor editing. Search the full tool catalog instantly and pin any tool to the Start menu to launch it with one click. Open, save, copy and share your work with built-in Windows integration. **🛡️ 100% Offline, 100% Private** No internet required. No account. No analytics, no tracking, no network calls. Your data never leaves your device. **Requirements:** Windows 10 version 1809 (build 17763) or later, or Windows 11.

-> QR Code Generator -> JSON Minifier, JSON Formatter and JSON Validator -> JSON to XML and YAML Converter -> XML Minifier, XML Formatter and XML Validator -> XML to JSON and YAML Converter -> YAML Validator -> YAML to JSON and XML Converter -> CSV to JSON, TSV and XML Converter -> TSV to JSON, CSV and XML Converter -> Base 64 Encoder and Decoder -> Share, Save or Copy Output -> Load Content from URL for processing -> Browse Content from your local disk for processing -> JSON Serializer -> JSON Unescape -> JS Object to JSON Converter -> HTML Encoder, HTML Attribute Encoder and URL Encoder -> URL Decoder, JS String Encoder and HTML Decoder

## Version 2.1 ### 🎉 New Features - Regex Tester rebuilt around pluggable engines: test patterns in .NET, .NET ECMAScript, JavaScript (Edge's real engine, run locally), PCRE2, POSIX Basic or POSIX Extended. - Optional non-backtracking engine for the .NET flavor — linear-time matching that sidesteps catastrophic backtracking. - New Match/Replace switch: one shared pattern, flags and test text, with the replace panel shown only in Replace mode. - Sample patterns and replacement syntax help now adapt to the selected flavor. ### ✨ Improvements - Every tool page opens with a titled header strip showing its icon. - Tool windows now open maximized. ### 🔧 Fixes - Double-clicking a pane splitter resets the layout, now consistent across the editor, markup and codec panes, encryption and hash generator. ## Version 2.0 - Visual overhaul with WinUI3 - Added 30+ new tools