Simple Dev Tools

What's new

Every tool, fix, and small polish — in the order it shipped.

  1. v1.0.0Latest
    • NewSimple Dev Tools is live — 49 free, privacy-first developer tools running entirely in your browser.
    • NewEncoding & Conversion: Base64, URL Encoder/Decoder, JSON ↔ YAML, JSON ↔ CSV, and more.
    • NewFormatters & Validators: JSON Formatter, YAML Validator, JSON Schema Validator, Regex Tester.
    • NewSecurity & Auth: JWT Decoder, Hash Generator, Bcrypt Hash Generator, HMAC Generator, Certificate Decoder.
    • NewGenerators: UUID Generator, NanoID/ULID Generator, Password Generator, Lorem Ipsum Generator.
    • NewAI / LLM tools: Token Counter, Pricing Calculator, Context Window Calculator.
    • NewDevOps tools: Dockerfile Linter, CIDR/Subnet Calculator, K8s YAML tools, User-Agent Parser.
    • NewInstallable as a PWA with full offline support — every tool works without an internet connection.
    • New100% client-side: no uploads, no logging, no tracking. Your data never leaves your browser.
That's everything — more is always brewing.