DevBox Developer Toolbox

Local-first developer tools for formatting, security, design, and utilities. QR, API requests, and optional AI use network access.

DevBox — The Complete Developer Toolbox for Chrome DevBox is a powerful all-in-one developer toolbox for Chrome that brings 32+ essential developer tools into one lightweight extension. Format, convert, decode, encrypt, test, generate, and manage developer data without leaving your browser or relying on dozens of separate websites. Install DevBox to access essential tools for JSON, XML, YAML, SQL, JWT, Base64, hashing, API testing, security, colors, QR codes, regex, and more — with most tools running entirely offline and client-side. ✨ Why Choose DevBox 🛠️ 32+ Developer Tools — Access essential tools for development, testing, security, data processing, and everyday workflows in one extension 🔄 Format & Convert — Format JSON, XML, YAML, SQL, and TOML, and convert between CSV and JSON instantly 🔐 Security & Encoding — Decode JWTs, encode and decode Base64, generate hashes, and create HMAC signatures ⚡ Fast & Lightweight — Get instant results without switching tabs, opening websites, or waiting for page reloads 🌐 Works Offline — Most tools run entirely client-side, keeping your data on your device 🧰 Built for Developers — Designed for web developers, backend engineers, QA testers, and students 🚀 Free + Pro Tools — Use the core developer toolkit for free, with optional Pro features for advanced workflows and security tools ✨ What You Can Do with DevBox 🔽 Format Data — Beautify and format JSON, XML, YAML, SQL, and TOML with ease 🔄 Convert Data — Convert CSV to JSON and JSON to CSV in just a few clicks 🔑 Decode & Encode — Decode JWT tokens and encode or decode Base64 data instantly #️⃣ Generate Hashes — Create MD5, SHA-1, SHA-256, SHA-512 hashes and HMAC signatures 🎨 Work with Colors — Pick and convert colors between HEX, RGB, HSL, CMYK, and more 📱 Generate QR Codes — Create QR codes quickly for URLs and other data 🔍 Test Regex — Test and validate regular expressions directly in your browser ⚖️ Compare Text — Find differences between text, code, or data using the built-in diff checker 🆔 Generate UUIDs — Create unique UUIDs instantly for development and testing 🕐 Convert Timestamps — Convert and work with timestamps quickly and easily ⏰ Build Cron Expressions — Create and understand cron expressions for scheduled tasks 🔗 Parse URLs — Analyze and break down URLs into their individual components 🔠 Transform Text — Convert text between different cases and formats 🧪 Test APIs — Send REST API requests, inspect responses, and manage reusable request collections 📋 Validate JSON — Check data against JSON Schemas and identify invalid structures 🎲 Generate Mock Data — Create reusable mock datasets for development and testing 💻 Save Code Snippets — Store and reuse frequently used code snippets directly inside DevBox ✨ DevBox Pro Features 🔐 AES Encryption — Encrypt sensitive data using AES encryption tools 🔑 RSA Key Generator — Generate RSA key pairs for development and security workflows 🔒 Advanced Password Generator — Create strong and customizable passwords 🚀 SVG Optimizer — Optimize SVG files for cleaner and more efficient output 🖼️ SVG-to-PNG Export — Convert SVG graphics into PNG images quickly 🌐 Favicon Generator — Generate favicons for websites and web projects 🧪 Advanced Developer Workflows — Access additional Pro tools designed for security, data processing, and professional development workflows ⭐ Why Developers Install DevBox Replace dozens of bookmarked developer websites with one lightweight Chrome extension Format, convert, decode, encrypt, and test data without leaving your browser Access 32+ essential developer tools from one convenient popup Get instant results without unnecessary tabs or page reloads Keep most development data local with client-side processing Use a free core toolkit with optional Pro features for advanced workflows Built for developers, engineers, QA testers, and students 🔐 Privacy and Security DevBox does not collect analytics or telemetry. The vast majority of tools work completely offline and process data locally on your device. Only specific features that require network access — including QR code generation, REST API request testing, and optional AI-powered features using your own API key — connect to external services when you explicitly use those features. Your development data stays on your device whenever the selected tool can operate locally. DevBox is designed with privacy in mind, giving you a fast and convenient developer toolkit without requiring you to upload your data to third-party websites. DevBox is an all-in-one developer toolbox for Chrome — format JSON, XML, YAML, SQL, and TOML, decode JWT and Base64, generate hashes, test APIs, encrypt data, work with colors, generate QR codes, test regex, compare text, create UUIDs, and much more, all from one powerful browser extension.