Smart Developer Tools, Drawn by Hand

Free, fast, and delightfully simple. Two tools that solve the everyday headaches of every developer.

Try Timestamp Converter Try JSON to TypeScript

Smart Timestamp Converter

Paste any JSON, log, or text — we auto-find every timestamp and show you the dates. No more manually copying numbers.

  • Auto-detects Unix timestamps (sec, ms, μs)
  • Batch convert all timestamps at once
  • One-click replace in original text
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JSON to TypeScript

Paste JSON, get perfect TypeScript types. Smart optional field detection from arrays — something no other tool does.

  • Smart optional field detection
  • Union type inference
  • Multi-language: Go, Python, Java, Rust
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Why ToolSmart?

100% Client-Side

Your data never leaves your browser

Completely Free

No ads, no sign-up, no paywall

Lightning Fast

Instant results, no server round-trips