Dev Tool box - Developer Tools
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About this app
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.
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.
JSON formatter, URL encoder, Base64, JWT decoder, hash generator, and more.
Updated on
Safety starts with understanding how developers collect and share your data. Data privacy and security practices may vary based on your use, region, and age. The developer provided this information and may update it over time.
- No data shared with third partiesLearn more about how developers declare sharing
- No data collectedLearn more about how developers declare collection
What’s new
Fixed the tool list not showing on iPad.
The tool list is now visible as soon as the app opens.
Fixed the ad consent notice and the tracking prompt appearing at the same time.
The tool list is now visible as soon as the app opens.
Fixed the ad consent notice and the tracking prompt appearing at the same time.
Everyone
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About the developer
심성곤
tjdrhs90@gmail.com
오현로 45
강북구, 서울특별시 01155
South Korea
