Dev Tool box - Developer Tools
JSON formatter, URL encoder, Base64, JWT decoder, hash generator, and more.
About 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
📴 Fully offline — No internet connection required.
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