Online Dev Tools — Dev Studio

Developer & Security Tools for IT Professionals

Fuel The Infrastructure

Welcome

Online Dev Tools is a browser-based developer toolkit built for real work and technical exploration. All utilities run locally in your browser — no accounts, no uploads, no server-side processing of your data.

Core tools include:
– JSON Formatter and JSON validator
– JSON to TypeScript converter
– JWT Decoder with header and payload inspection
– CSP Analyzer for Content Security Policy review
– Hash Generator (SHA-256, SHA-384, SHA-512 and more)
– UUID Generator
– Log Explorer for structured log inspection

Built for web developers, full-stack engineers, software developers, security engineers, systems thinkers, infrastructure builders, sandbox experimenters, and technically curious enthusiasts who value speed, clarity, and minimal friction.

Take a Break

Two lightweight browser games built in-house.

Latest updates

  • JWT Decoder: header/payload decoding + exp/iat/nbf checks + export
  • CSP Analyzer: severity findings + report download (.txt/.json)

What’s coming next

  • User-requested: Regex Playground
  • In progress: Secure Paste (client-side, self-destructing)

Check out the lab that I am (slowly) but surely bringing online. It's a ghost in the machine now but stick around!

BigHomieCed's Labs

Common Use Cases

  • Formatting and validating malformed JSON payloads
  • Inspecting JWT headers, payload claims, and expiration values
  • Reviewing and debugging Content Security Policy headers
  • Generating cryptographic hashes for integrity checks
  • Creating UUIDs for distributed systems and test data
  • Exploring structured logs during debugging or incident response

Security Model

  • No backend data persistence
  • No cross-user data access
  • Stateless request model
  • No account authentication surface
  • Minimal attack surface due to static delivery

Why Local-First?

  • Lower latency — no round-trip to a processing server
  • Reduced risk of sensitive data exposure
  • No backend infrastructure dependency for core functionality
  • Transparent, inspectable browser execution
  • Predictable behavior without hidden processing layers