DevToolkit AI – JWT decoder, regex builder, cron generator with AI explanations

This is a suite of free online tools designed for anyone who works with code or data on a daily basis—whether you're a developer, data analyst, data scientist, or DevOps engineer.
Currently, it includes six tools:
🔑JWT Decoder — decodes and analyzes your tokens with a single click. AI explains each claim and detects security risks.
⚡Regex Builder — test your regular expressions in real time. Describe what you want in natural language, and the AI ​​generates the regex.
⏰Cron Generator — describe your schedule in natural language. The AI ​​produces the CRON expression plus the Spring Boot annotation, for example.
🛢️SQL Optimizer — formatting, anti-pattern detection, and intelligent index suggestions. Useful whether you're writing SQL for an application or for your data analysis.
🌿YAML <-> JSON — Instant bidirectional conversion with validation.
⚙️Spring Properties Generator — Generate a complete application.yml file from a simple description and audit the YAML configuration.
...Everything is free, no registration required. AI is here to go beyond what other tools offer.