DEVtoy - Developer Tools

About

For those of you still writing code by hand (you're amazing), here's a free, offline-first toolbox for the small jobs that interrupt your flow. Pick a tool, paste your input, and get a result you can copy. DEVtoy includes 56 tools, grouped like this: DATA & FORMAT • JSON Format/Validate • XML Beautify/Minify • YAML to JSON • JSON to YAML • CSV to JSON • JSON to CSV • SQL Formatter • Color Converter • Number Base Converter • HTML Beautify/Minify • CSS Beautify/Minify • JS Beautify/Minify • TOML to JSON • JSON to TOML • JSON Lines Converter • JSON Schema Validator • JSONPath Tester • JSON Diff • JSON Flatten/Unflatten • XML to JSON • JSON to XML ENCODE / DECODE • Base64 String Encode/Decode • Base64 Image Encode/Decode • Base32 Encode/Decode • URL Encode/Decode • URL Parser • JWT Debugger • Hash Generator • UUID/ULID Generate/Decode • HTML Entity Encode/Decode • Backslash Escape/Unescape • Hex to ASCII • ASCII to Hex • Certificate Decoder (X.509) • Unix Time Converter WEB & TEXT • HTML Preview • Markdown Preview • HTML to Markdown • Text Diff Checker • Lorem Ipsum Generator • Password Generator • QR Code Reader/Generator • String Inspector • Unicode Inspector • String Case Converter • Line Sort/Dedupe • RegExp Tester • Cron Job Parser CODE & DEVOPS • HTML to JSX • SVG to React Component • SVG to CSS • cURL to Code • JSON to Code • Docker Run to Compose • Semver Range Checker • CIDR / Subnet Calculator The built-in tools process your input on your device and work without an internet connection. There's no account to create, and DEVtoy is free. If none of the tools quite fits, open Universal Tool, describe what you want done, and let Apple's Foundation Model help transform your input. It runs on your device, and is available on supported hardware with Apple Intelligence enabled on iOS 27, macOS 27, or visionOS 27 and later. Its output can be wrong, so give it a quick review before using it.