Dev Tool box - Developer Tools

Dev Toolbox is a fast, lightweight developer utility app for your mobile device 🛠️

Format JSON, encode URLs, decode Base64, inspect JWT tokens, and more -- all without opening your laptop ⚡

📋 Features

🔸 JSON Formatter — Pretty-print and validate JSON strings instantly.

🔸 URL Encode/Decode — Encode and decode URLs with RFC 3986 compliance.

🔸 Base64 Encode/Decode — Convert text to and from Base64. Supports URL-safe format.

🔸 JWT Decoder — Decode JWT tokens into Header, Payload, and Signature.

🔸 Text Case Converter — Convert between 9 text cases including camelCase, snake_case, kebab-case, PascalCase, and more.

🔸 Hash Generator — Generate MD5, SHA-1, SHA-256, and SHA-512 hashes at once.

🔸 Unix Timestamp Converter — Convert between Unix timestamps and human-readable dates.

🔸 Number Base Converter — Auto-detect and convert between decimal, binary, octal, and hexadecimal.

🔸 String Escape/Unescape — Handle escape sequences in strings.

🔸 Color Converter — Convert between HEX, RGB, and HSL with a live color preview.

✨ Highlights

💾 Auto-save — Your input is saved and restored automatically.

🌙 Dark mode support

📋 One-tap copy to clipboard

📱 On-device — every conversion runs locally and your input is never uploaded.